DailyFX Forum - Indicator SDK Support

how to get data for backtesting easier?

gorak — Mon, 09 Nov 2009 03:36:39 GMT

Hi,
For now, I get fxcm data week by week by logging in on Saturday, opening my preferred crosses in Marketscope 2.0, then selecting File>Export...>Export to Excel. I enlarge the chart to encompass the whole week, and usually get a few data points from the previous week's Friday. Then I edit the resulting file to cut off the extra data from the previous Friday (select the lines in a text editor and delete).
I was wondering if there is a more convenient way to get this file? Also, is there a way to export data from a larger timeframe? The maximum I got from enlarging the chart was about 3 months of 5-minute data.
Thanks

Testing on the weekend?

reidwatkins — Sat, 31 Oct 2009 06:36:52 GMT

Is there any way to view custom indicators in Marketscope on the weekend? (Using historical data, of course.)

Is there a 'c' interface available?

jfitz1959 — Wed, 21 Oct 2009 03:07:09 GMT

Can one call 'c' functions from the indicator sdk lua implementation?

Example: Demarker

Nikolay.Gekht — Mon, 12 Oct 2009 18:18:17 GMT

Here is a source code for the DeMarker oscillator as it is described at DeMarker � Technical Indicators, Technical Analysis.

1) Create the file dem.lua
2) Copy the code below into this file
3) Save the file
or
1,2,3) Just right-click on this link and choose "Save As..." from the menu.

4) Go to "Charts/Chart/Manage Custom Indicators" menu of the Trading Station
5) Click "Load"
6) Choose the dem.lua file created at the previous steps

Code:

-- initializes the indicator

function Init()

    indicator:name("DeMarker");

    indicator:description("")

    indicator:requiredSource(core.Bar);

    indicator:type(core.Oscillator);



    indicator.parameters:addInteger("N", "Number of periods for smoothing", "", 14);

    indicator.parameters:addColor("C", "Color of the oscillator", "", core.rgb(0, 127, 127));

end



local source;

local first;

local out;

local max;

local min;

local smax;

local smin;

local n;



-- process parameters and prepare for calculations

function Prepare()

    n = instance.parameters.N;

    source = instance.source;



    max = instance:addInternalStream(source:first() + 1);

    min = instance:addInternalStream(source:first() + 1);

    smax = core.indicators:create("MVA", max, n, core.rgb(0, 0, 0));

    smin = core.indicators:create("MVA", min, n, core.rgb(0, 0, 0));

    first = smax.DATA:first();

    name = profile:id() .. "(" .. n .. ")";

    instance:name(name);

    out = instance:addStream("DeM", core.Line, name .. ".DeM", "DeM", instance.parameters.C, first);

    out:addLevel(0);

    out:addLevel(0.3);

    out:addLevel(0.5);

    out:addLevel(0.7);

    out:addLevel(1);

end



-- Indicator calculation routine

function Update(period, mode)

    if (period > source:first() + 1) then

        if (source.high[period] > source.high[period - 1]) then

            max[period] = source.high[period] - source.high[period - 1]

        else

            max[period] = 0;

        end

        if (source.low[period] < source.low[period - 1]) then

            min[period] = source.low[period - 1] - source.low[period];

        else

            min[period] = 0;

        end

    end

    smax:update(mode);

    smin:update(mode);

    if (period >= first) then

        local vmax;

        local vmin;

        vmax = smax.DATA[period];

        vmin = smin.DATA[period];

        if (vmax == 0 and vmin == 0) then

            out[period] = nil;

        else

            out[period] = vmax / (vmax + vmin);

        end

    end

end

Attached Thumbnails

Example: Fractal Indicator

Nikolay.Gekht — Mon, 12 Oct 2009 17:51:36 GMT

Here is a source code for the Bill Williams 5-bar Fractal oscillator as it is described at Fractals — Technical Indicators, Technical Analysis

1) Create the file fractal.lua
2) Copy the code below into this file
3) Save the file
or
1,2,3) Just right-click on this link and choose "Save As..." from the menu.

4) Go to "Charts/Chart/Manage Custom Indicators" menu of the Trading Station
5) Click "Load"
6) Choose the fractal.lua file created at the previous steps

Unfortunately, the current version of the Marketscope does not support the labels, so, the fractals
are specified as the red (up) or green (down) bars in the oscillator area.

Code:

function Init()

    indicator:name("Fractal");

    indicator:description("Bill Williams Fractal oscillator")

    indicator:requiredSource(core.Bar);

    indicator:type(core.Oscillator);



    indicator.parameters:addColor("UpC", "Color of the up fractal", "", core.rgb(255, 0, 0));

    indicator.parameters:addColor("DownC", "Color of the down fractal", "", core.rgb(0, 255, 0));

end



local source;

local up, down;



function Prepare()

    source = instance.source;

    local name = profile:id();

    instance:name(name);

    up = instance:addStream("Up", core.Bar, name .. ".Up", "Up", instance.parameters.UpC, 4, -2);

    up:addLevel(1);

    up:addLevel(0);

    up:addLevel(-1);

    down = instance:addStream("Down", core.Bar, name .. ".Down", "Down", instance.parameters.DownC, 4, -2);

end



function Update(period, mode)

    if (period > 6) then

        local curr = source.high[period - 2];

        if (curr > source.high[period - 4] and curr > source.high[period - 3] and

            curr > source.high[period - 1] and curr > source.high[period]) then

            up[period - 2] = 1;

        else

            up[period - 2] = nil;

        end

        curr = source.low[period - 2];

        if (curr < source.low[period - 4] and curr < source.low[period - 3] and

            curr < source.low[period - 1] and curr < source.low[period]) then

            down[period - 2] = -1;

        else

            down[period - 2] = nil;

        end

    end

end

Attached Images

Line Studies

jonnroc — Thu, 08 Oct 2009 17:28:41 GMT

Can lines that are drawn on the chart be referenced by the Lua code?

Example: Gator

Nikolay.Gekht — Wed, 23 Sep 2009 21:55:45 GMT

Here is a source code for the GATOR oscillator as it is described at Gator Oscillator by Bill Williams | Forex Indicators Guide.

1) Create the file gator.lua
2) Copy the code below into this file
3) Save the file
or
1,2,3) Just right-click on this link and choose "Save As..." from the menu.

4) Go to "Charts/Chart/Manage Custom Indicators" menu of the Trading Station
5) Click "Load"
6) Choose the gator.lua file created at the previous steps

IMPORTANT NOTE At the moment of indicator writing (Sep, 23 2009), the indicator core library has an error which prevents the gator indicator from working well. Please, download the fixed core here and replace indicore2 file with this file in the ""C:\Program Files\Candleworks\FXTS2\" and/or "C:\Program Files\Candleworks\FXOrder2Go\" folders, in case your version is earlier than Sep, 23 2009.

Code:

-- initializes the indicator

function Init()

    indicator:name("Gator");

    indicator:description("")

    indicator:requiredSource(core.Tick);

    indicator:type(core.Oscillator);



    indicator.parameters:addInteger("JawN", "Number of periods for smoothing the alligator jaw", "", 13, 2, 1000);

    indicator.parameters:addInteger("JawS", "Number of periods for shifting the alligator jaw", "", 8, 1, 100);

    indicator.parameters:addInteger("TeethN", "Number of periods for smoothing the alligator teeth", "", 8, 2, 1000);

    indicator.parameters:addInteger("TeethS", "Number of periods for shifting the alligator teeth", "", 5, 1, 100);

    indicator.parameters:addInteger("LipsN", "Number of periods for smoothing the alligator lips", "", 5, 2, 1000);

    indicator.parameters:addInteger("LipsS", "Number of periods for shifting the alligator lips", "", 3, 1, 100);

    indicator.parameters:addString("MTH", "Alligator Smoothing method", "", "MVA");

    indicator.parameters:addStringAlternative("MTH", "MVA", "", "MVA");

    indicator.parameters:addStringAlternative("MTH", "EMA", "", "EMA");

    indicator.parameters:addStringAlternative("MTH", "LWMA", "", "LWMA");

    indicator.parameters:addColor("CL_color", "Color for covering line", "Color for covering line", core.rgb(255, 255, 255));

    indicator.parameters:addColor("GO_color", "Color for higher bars", "Color for higher bars", core.rgb(0, 255, 0));

    indicator.parameters:addColor("RO_color", "Color for lower bars", "Color for lower bars", core.rgb(255, 0, 0));



end



-- lines parameters

local JawN, JawS;

local TeethN, TeethS;

local LipsN, LipsC;



-- indicator source

local source;



-- alligator lines

local Jaw, Teeth, Lips;

-- alligator lines sources

local JawSrc, TeethSrc, LipsSrc;

-- gator bars

local Up, Down, UpRed, UpGreen, DownRed, DownGreen;

-- bar's parameters

local UpExtent, DownExtent;

local UpFirst, DownFirst;



-- process parameters and prepare for calculations

function Prepare()

    JawN = instance.parameters.JawN;

    JawS = instance.parameters.JawS;

    TeethN = instance.parameters.TeethN;

    TeethS = instance.parameters.TeethS;

    LipsN = instance.parameters.LipsN;

    LipsS = instance.parameters.LipsS;



    source = instance.source;



    JawSrc = core.indicators:create(instance.parameters.MTH, source, JawN, core.rgb(0, 0, 0));

    TeethSrc = core.indicators:create(instance.parameters.MTH, source, TeethN, core.rgb(0, 0, 0));

    LipsSrc = core.indicators:create(instance.parameters.MTH, source, LipsN, core.rgb(0, 0, 0));



    local name = profile:id() .. "(" .. source:name() .. ", " .. JawN .. "(" .. JawS .. ")," .. TeethN .. "(" .. TeethS .. ")," .. LipsN .. "(" .. LipsS .. "))";

    instance:name(name);





    Jaw = instance:addInternalStream(JawSrc.DATA:first() + JawS, JawS);

    Teeth = instance:addInternalStream(TeethSrc.DATA:first() + TeethS, TeethS);

    Lips = instance:addInternalStream(LipsSrc.DATA:first() + LipsS, LipsS);



    UpExtent = math.min(JawS, TeethS);

    UpFirst = math.max(Jaw:first(), Teeth:first());

    Up = instance:addStream("UP", core.Line, name .. ".UP", "UP", instance.parameters.CL_color, UpFirst, UpExtent);

    Up:addLevel(0);

    UpRed = instance:addStream("UPR", core.Bar, name .. ".UPR", "UPR", instance.parameters.RO_color, UpFirst, UpExtent);

    UpGreen = instance:addStream("UPG", core.Bar, name .. ".UPG", "UPG", instance.parameters.GO_color, UpFirst, UpExtent);



    DownExtent = math.min(TeethS, LipsS);

    DownFirst = math.max(Teeth:first(), Lips:first());

    Down = instance:addStream("DOWN", core.Line, name .. ".DN", "DN", instance.parameters.CL_color, DownFirst, DownExtent);

    DownRed = instance:addStream("DNR", core.Bar, name .. ".DNR", "DNR", instance.parameters.RO_color, DownFirst, DownExtent);

    DownGreen = instance:addStream("DNG", core.Bar, name .. ".DNG", "DNG", instance.parameters.GO_color, DownFirst, DownExtent);





end



-- Indicator calculation routine

function Update(period, mode)

    -- calculate alligator

    JawSrc:update(mode);

    TeethSrc:update(mode);

    LipsSrc:update(mode);



    if (period + JawS >= 0 and period >= JawSrc.DATA:first()) then

        Jaw[period + JawS] = JawSrc.DATA[period];

    end



    if (period + TeethS >= 0 and period >= TeethSrc.DATA:first()) then

        Teeth[period + TeethS] = TeethSrc.DATA[period];

    end



    if (period + LipsS >= 0 and period >= LipsSrc.DATA:first()) then

        Lips[period + LipsS] = LipsSrc.DATA[period];

    end

    -- calculate gator

    if period >= UpFirst then

        Up[period + UpExtent] = math.abs(Jaw[period + UpExtent] - Teeth[period + UpExtent]);

        if period >= UpFirst + 1 then

            if Up[period + UpExtent] >= Up[period + UpExtent - 1] then

                UpGreen[period + UpExtent] = Up[period + UpExtent];

            else

                UpRed[period + UpExtent] = Up[period + UpExtent];

            end

        end

    end

    if period >= DownFirst then

        Down[period + DownExtent] = -math.abs(Teeth[period + DownExtent] - Lips[period + DownExtent]);

        if period >= DownFirst + 1 then

            if Down[period + DownExtent] >= Down[period + DownExtent - 1] then

                DownGreen[period + DownExtent] = Down[period + DownExtent];

            else

                DownRed[period + DownExtent] = Down[period + DownExtent];

            end

        end

    end

end

Attached Images

Example: Acceleration/Deceleration

Nikolay.Gekht — Tue, 22 Sep 2009 22:08:07 GMT

Here is an examples of Acceleration/Deceleration oscillator as it is described at Accelerator/Decelerator Oscillator - Bill Williams - Technical Indicators - Technical Analysis

How to install:

1) Create the file AC.lua
2) Copy the code below into this file
3) Save the file
or
1,2,3) Just right-click on this link and choose "Save As..." from the menu.

4) Go to "Charts/Chart/Manage Custom Indicators" menu of the Trading Station
5) Click "Load"
6) Choose the AC.lua file create at the previous steps

Please note that Awesome Oscillator indicator must be also installed (http://forexforums.dailyfx.com/indic...scillator.html) and named AO.lua

Code:

function Init()

    indicator:name("Acceleration/Deceleration");

    indicator:description("No description");

    indicator:requiredSource(core.Bar);

    indicator:type(core.Oscillator);



    indicator.parameters:addInteger("FM", "Fast Moving Average for Awesome oscillator", "The number of periods to calculate the fast moving average of the median price", 5, 2, 10000);

    indicator.parameters:addInteger("SM", "Slow Moving Average for Awesome oscillator", "The number of periods to calculate the slow moving average of the median price", 35, 2, 10000);

    indicator.parameters:addInteger("M", "Moving Average for Acceleration/Deceleration", "The number of periods to calculate the moving average of the AO", 5, 2, 10000);

    indicator.parameters:addColor("CL_color", "Color for covering line", "Color for covering line", core.rgb(255, 255, 255));

    indicator.parameters:addColor("GO_color", "Color for higher bars", "Color for higher bars", core.rgb(0, 255, 0));

    indicator.parameters:addColor("RO_color", "Color for lower bars", "Color for lower bars", core.rgb(255, 0, 0));

end



local FM;

local SM;

local M;



local first;

local source = nil;



-- Streams block

local CL = nil;

local GO = nil;

local RO = nil;



local AO = nil;

local MVA = nil;



function Prepare()

    FM = instance.parameters.FM;

    SM = instance.parameters.SM;

    M = instance.parameters.M;



    source = instance.source;



    AO = core.indicators:create("AO", source, FM, SM);

    MVA = core.indicators:create("MVA", AO.DATA, M);

    first = MVA.DATA:first();



    local name = profile:id() .. "(" .. source:name() .. ", " .. FM .. ", " .. SM .. ", " .. M .. ")";

    instance:name(name);

    CL = instance:addStream("AC", core.Line, name .. ".AC", "AC", instance.parameters.CL_color, first);

    CL:addLevel(0);

    GO = instance:addStream("GO", core.Bar, name .. ".GO", "GO", instance.parameters.GO_color, first);

    RO = instance:addStream("RO", core.Bar, name .. ".RO", "RO", instance.parameters.RO_color, first);

end



function Update(period, mode)

    AO:update(mode);

    MVA:update(mode);



    if (period >= first) then

        CL[period] = AO.DATA[period] - MVA.DATA[period];

    end

    if (period >= first + 1) then

        if (CL[period] > CL[period - 1]) then

            GO[period] = CL[period];

        else

            RO[period] = CL[period];

        end

    end

end

Example: Awesome Oscillator

Nikolay.Gekht — Tue, 22 Sep 2009 21:54:39 GMT

Here is an example of the Awesome Oscillator as it is described at Awesome Oscillator — Technical Indicators, Technical Analysis

How to install:

1) Create the file AO.lua
2) Copy the code below into this file
3) Save the file
or
1,2,3) Just right-click on this link and choose "Save As..." from the menu.

4) Go to "Charts/Chart/Manage Custom Indicators" menu of the Trading Station
5) Click "Load"
6) Choose the AO.lua file create at the previous steps

or

Code:

function Init()

    indicator:name("Awesome Oscillator");

    indicator:description("No description");

    indicator:requiredSource(core.Bar);

    indicator:type(core.Oscillator);



    indicator.parameters:addInteger("FM", "Fast Moving Average", "The number of periods to calculate the fast moving average of the median price", 5, 2, 10000);

    indicator.parameters:addInteger("SM", "Slow Moving Average", "The number of periods to calculate the slow moving average of the median price", 35, 2, 10000);

    indicator.parameters:addColor("CL_color", "Color for covering line", "Color for covering line", core.rgb(255, 255, 255));

    indicator.parameters:addColor("GO_color", "Color for higher bars", "Color for higher bars", core.rgb(0, 255, 0));

    indicator.parameters:addColor("RO_color", "Color for lower bars", "Color for lower bars", core.rgb(255, 0, 0));

end



local FM;

local SM;



local first;

local source = nil;



-- Streams block

local CL = nil;

local GO = nil;

local RO = nil;



local MEDIAN = nil;

local FMVA = nil;

local SMVA = nil;



function Prepare()

    FM = instance.parameters.FM;

    SM = instance.parameters.SM;



    assert(FM < SM, "Fast moving average parameter must be less than slow moving average");



    source = instance.source;

    first = source:first() + SM;



    -- Create the median stream

    MEDIAN = instance:addInternalStream(0, 0);

    FMVA = core.indicators:create("MVA", MEDIAN, FM);

    SMVA = core.indicators:create("MVA", MEDIAN, SM);



    local name = profile:id() .. "(" .. source:name() .. ", " .. FM .. ", " .. SM .. ")";

    instance:name(name);

    CL = instance:addStream("AO", core.Line, name .. ".AO", "AO", instance.parameters.CL_color, first);

    CL:addLevel(0);

    GO = instance:addStream("GO", core.Bar, name .. ".GO", "GO", instance.parameters.GO_color, first);

    RO = instance:addStream("RO", core.Bar, name .. ".RO", "RO", instance.parameters.RO_color, first);

end



function Update(period, mode)

    MEDIAN[period] = (source.high[period] + source.low[period]) / 2;

    FMVA:update(mode);

    SMVA:update(mode);



    if (period >= first) then

        CL[period] = FMVA.DATA[period] - SMVA.DATA[period];

    end

    if (period >= first + 1) then

        if (CL[period] > CL[period - 1]) then

            GO[period] = CL[period];

        else

            RO[period] = CL[period];

        end

    end

end

How to plot Heikin Ashi on MarketScope

fxmoonglow — Sun, 23 Aug 2009 08:22:57 GMT

Hi,

I am trying to find source code for ploting Heikin Ashi on MarketScope, but i can't find any.

It is possible to code this indicator on Market Scope?

fxmoonglow.

Example: Donchian Channel Indicator

Nikolay.Gekht — Mon, 03 Aug 2009 21:47:40 GMT

1) Create the file DNC.lua
2) Copy the code below into this file
3) Save the file
or
1,2,3) Just right-click on this link and choose "Save As..." from the menu.

4) Go to "Charts/Chart/Manage Custom Indicators" menu of the Trading Station
5) Click "Load"
6) Choose the DNC.lua file created at the previous steps

Code:

-- initializes the indicator

function Init()

    indicator:name("Donchian Channel")

    indicator:description("The simple trend-following indicator. Shows highest high and lowest low for the specified number of periods.");

    indicator:requiredSource(core.Bar);

    indicator:type(core.Indicator);



    indicator.parameters:addInteger("N", "Number of periods", "", 20, 2, 10000);

    indicator.parameters:addString("AC", "Analyze the current period", "", "yes");

    indicator.parameters:addStringAlternative("AC", "no", "", "no");

    indicator.parameters:addStringAlternative("AC", "yes", "", "yes");

    indicator.parameters:addColor("clrDU", "Color of the Up line", "", core.rgb(255, 255, 0));

    indicator.parameters:addColor("clrDN", "Color of the Down line", "", core.rgb(255, 255, 0));

    indicator.parameters:addColor("clrDM", "Color of the middle line", "", core.rgb(255, 255, 0));

    indicator.parameters:addString("SM", "Show middle line", "", "no");

    indicator.parameters:addStringAlternative("SM", "no", "", "no");

    indicator.parameters:addStringAlternative("SM", "yes", "", "yes");



end



local first = 0;

local n = 0;

local ac = true;

local sm = false;

local source = nil;

local dn = nil;

local du = nil;

local dm = nil;



-- initializes the instance of the indicator

function Prepare()

    source = instance.source;

    n = instance.parameters.N;

    ac = (instance.parameters.AC == "yes");

    sm = (instance.parameters.SM == "yes");



    first = n + source:first() - 1;

    if (not ac) then

        first = first + 1;

    end

    local name = profile:id() .. "(" .. source:name() .. "," .. n .. ")";

    instance:name(name);

    dn = instance:addStream("DU", core.Line, name .. ".DU", "DU", instance.parameters.clrDU,  first)

    du = instance:addStream("DN", core.Line, name .. ".DN", "DN", instance.parameters.clrDN,  first)

    if (sm) then

        dm = instance:addStream("DM", core.Line, name .. ".DM", "DM", instance.parameters.clrDM,  first)

    end

end



-- calculate the value

function Update(period)

    if (period >= first) then

        local range;

        if (ac) then

            range = core.rangeTo(period, n);

        else

            range = core.rangeTo(period - 1, n);

        end

        du[period] = core.max(source.high, range);

        dn[period] = core.min(source.low, range);

        if (sm) then

            dm[period] = (du[period] + dn[period]) / 2;

        end

    end

end

Multi datasource

TryFX — Tue, 28 Jul 2009 14:02:25 GMT

Hi, I realised that I am able to get data from a single source such as EUR/USD.close. Is it possible to get data from multiple source?

Thanks

Sample Input Stream Data File?

knn10 — Sat, 25 Jul 2009 00:14:55 GMT

Hello,

I have read the documentation provided with the indicator SDK... It did not provide any specification on the input stream data file requirement for use in the debugger... Can you provide format information on the file requirements or perhaps a test data file I can use?

Thanks,

Nate

Example: The Elder-Ray Indicator

Nikolay.Gekht — Wed, 15 Jul 2009 23:39:08 GMT

Here is the source code of The Elder-Ray Indicator as it is described at Investopedia: The Elder-Ray Indicator: Seeing Into The Market

1) Create the file elray.lua
2) Copy the code below into this file
3) Save the file
or
1,2,3) Just right-click on this link and choose "Save As..." from the menu.

4) Go to "Charts/Chart/Manage Custom Indicators" menu of the Trading Station
5) Click "Load"
6) Choose the elray.lua file created at the previous steps

Code:

-- Description from the http://www.investopedia.com/articles/trading/03/022603.asp



-- initializes the indicator

function Init()

    indicator:name("Elder-Ray");

    indicator:description("")

    indicator:requiredSource(core.Bar);

    indicator:type(core.Oscillator);



    indicator.parameters:addInteger("N", "Number of periods for smoothing", "", 13);

    indicator.parameters:addColor("BullC", "Color of the bull power line", "", core.rgb(255, 0, 0));

    indicator.parameters:addColor("BearC", "Color of the bear power line", "", core.rgb(0, 255, 0));

end



local source;

local EMA;

local Bull;

local Bear;



-- process parameters and prepare for calculations

function Prepare()

    source = instance.source;

    EMA = core.indicators:create("EMA", source.close, instance.parameters.N, core.rgb(0, 0, 0));

    local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.N .. ")";

    instance:name(name);

    Bull = instance:addStream("Bull", core.Line, name .. ".Bull", "Bull", instance.parameters.BullC, EMA.DATA:first());

    Bear = instance:addStream("Bear", core.Line, name .. ".Bear", "Bear", instance.parameters.BearC, EMA.DATA:first());

    Bull:addLevel(0);

end



-- Indicator calculation routine

function Update(period, mode)

    EMA:update(mode);



    if (period >= EMA.DATA:first()) then

        Bull[period] = source.high[period] - EMA.DATA[period];

        Bear[period] = source.low[period] - EMA.DATA[period];

    end

end

Example: Alligator indicator

Nikolay.Gekht — Wed, 15 Jul 2009 23:03:44 GMT

Here is a source code for the Alligator indicator as it is described at Alligator and Gator Oscillator — Technical Indicators, Technical Analysis.

1) Create the file alligator.lua
2) Copy the code below into this file
3) Save the file
or
1,2,3) Just right-click on this link and choose "Save As..." from the menu.

4) Go to "Charts/Chart/Manage Custom Indicators" menu of the Trading Station
5) Click "Load"
6) Choose the alligator.lua file created at the previous steps

Code:

-- Description from the http://www.metaquotes.net/techanalysis/indicators/alligator



-- initializes the indicator

function Init()

    indicator:name("Alligator");

    indicator:description("")

    indicator:requiredSource(core.Tick);

    indicator:type(core.Indicator);



    indicator.parameters:addInteger("JawN", "Number of periods for smoothing the alligator jaw", "", 13);

    indicator.parameters:addInteger("JawS", "Number of periods for shifting the alligator jaw", "", 8);

    indicator.parameters:addColor("JawC", "Color of the the alligator jaw", "", core.rgb(0, 0, 255));

    indicator.parameters:addInteger("TeethN", "Number of periods for smoothing the alligator teeth", "", 8);

    indicator.parameters:addInteger("TeethS", "Number of periods for shifting the alligator teeth", "", 5);

    indicator.parameters:addColor("TeethC", "Color of the the alligator teeth", "", core.rgb(255, 0, 0));

    indicator.parameters:addInteger("LipsN", "Number of periods for smoothing the alligator lips", "", 5);

    indicator.parameters:addInteger("LipsS", "Number of periods for shifting the alligator lips", "", 3);

    indicator.parameters:addColor("LipsC", "Color of the the alligator lips", "", core.rgb(0, 255, 0));

    indicator.parameters:addString("MTH", "Smoothing method", "", "MVA");

    indicator.parameters:addStringAlternative("MTH", "MVA", "", "MVA");

    indicator.parameters:addStringAlternative("MTH", "EMA", "", "EMA");

    indicator.parameters:addStringAlternative("MTH", "LWMA", "", "LWMA");

end



-- lines parameters

local JawN, JawS;

local TeethN, TeethS;

local LipsN, LipsC;



-- indicator source

local source;



-- lines

local Jaw, Teeth, Lips;

-- lines sources

local JawSrc, TeethSrc, LipsSrc;



-- process parameters and prepare for calculations

function Prepare()

    JawN = instance.parameters.JawN;

    JawS = instance.parameters.JawS;

    TeethN = instance.parameters.TeethN;

    TeethS = instance.parameters.TeethS;

    LipsN = instance.parameters.LipsN;

    LipsS = instance.parameters.LipsS;



    source = instance.source;



    JawSrc = core.indicators:create(instance.parameters.MTH, source, JawN, core.rgb(0, 0, 0));

    TeethSrc = core.indicators:create(instance.parameters.MTH, source, TeethN, core.rgb(0, 0, 0));

    LipsSrc = core.indicators:create(instance.parameters.MTH, source, LipsN, core.rgb(0, 0, 0));



    local name = profile:id() .. "(" .. source:name() .. ", " .. JawN .. "(" .. JawS .. ")," .. TeethN .. "(" .. TeethS .. ")," .. LipsN .. "(" .. LipsS .. "))";

    instance:name(name);

    Jaw = instance:addStream("Jaw", core.Line, name .. ".Jaw", "Jaw", instance.parameters.JawC, JawSrc.DATA:first() + JawS, JawS);

    Teeth = instance:addStream("Teeth", core.Line, name .. ".Teeth", "Teeth", instance.parameters.TeethC, TeethSrc.DATA:first() + TeethS, TeethS);

    Lips = instance:addStream("Lips", core.Line, name .. ".Lips", "Lips", instance.parameters.LipsC, LipsSrc.DATA:first() + LipsS, LipsS);

end



-- Indicator calculation routine

function Update(period, mode)

    JawSrc:update(mode);

    TeethSrc:update(mode);

    LipsSrc:update(mode);



    if (period + JawS >= 0 and period >= JawSrc.DATA:first()) then

        Jaw[period + JawS] = JawSrc.DATA[period];

    end



    if (period + TeethS >= 0 and period >= TeethSrc.DATA:first()) then

        Teeth[period + TeethS] = TeethSrc.DATA[period];

    end



    if (period + LipsS >= 0 and period >= LipsSrc.DATA:first()) then

        Lips[period + LipsS] = LipsSrc.DATA[period];

    end

end