"Gator" Oscillator (closed topic)

[admin]

Note: This version is OLD version of the indicator. To get the new version please follow this link:
viewtopic.php?f=17&t=1975.

Gator Oscillator is based on the Alligator Indicator and shows the degree of convergence/divergence of the Smoothed Moving Averages. Gator oscillator is usually used in combination with “Alligator” indicator. (As you can see on the screenshot)

Gator displays 2 history graphs:

• Top Graph: Shows the distance between Blue and Red lines of the “Alligator”. (Jaws <-> Teeth)
• Bottom Graph: Shows the distance between Red and Green lines of the “Alligator”. (Teeth <-> Lips)

“Gator” shows convergence and intertwining of the Lines when “Alligator” indicator is “asleep” or “awake” and can help you identify a trend.

Calculation:
Top Graph = | Alligator Jaw – Alligator Teeth |
Bottom Graph = - | Alligator Teeth – Alligator Lips |
(*|| means the absolute value.)

Gator Screenshot. (Note that "Gator" is the oscillator below. Over the chart lines is the Alligator Indicator, with which "Gator" is usually used.)

gator.lua

Download "Gator" indicator.

(5.36 KiB) Downloaded 1800 times

Tags: Gator, indicator, Marketscope, oscillator, Trading Station, FXCM, dbFX

The indicator was revised and updated

[Nikolay.Gekht]

As for the alligator indicator, the gator oscillator can be also calculated using smma average and median price.

Here is the modified version of the gator oscillator:

gator1.lua

Gator oscillator based on SMMA and median price

(5.61 KiB) Downloaded 1290 times

Source code:

Code: Select all

-- initializes the indicator
function Init()
    indicator:name("Gator1");
    indicator:description("Median and SMMA-based version of the gator")
    indicator:requiredSource(core.Bar);
    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", "Smoothing method", "", "SMMA");
    indicator.parameters:addStringAlternative("MTH", "MVA", "", "MVA");
    indicator.parameters:addStringAlternative("MTH", "EMA", "", "EMA");
    indicator.parameters:addStringAlternative("MTH", "LWMA", "", "LWMA");
    indicator.parameters:addStringAlternative("MTH", "SMMA", "", "SMMA");
    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;
local median;

-- 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;
    median = instance:addInternalStream(source:first(), 0);

    JawSrc = core.indicators:create(instance.parameters.MTH, median, JawN, core.rgb(0, 0, 0));
    TeethSrc = core.indicators:create(instance.parameters.MTH, median, TeethN, core.rgb(0, 0, 0));
    LipsSrc = core.indicators:create(instance.parameters.MTH, median, 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
    median[period] = (source.high[period] + source.low[period]) / 2;
    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


[boursicoton]

color on gator..... not simply !

but if on gator histo < 0, down = green et up = red....waouh...! because mouvement is synchro with histo gator >0
gator explain the difference between alligator lines
if divergence : green for two histos
if convergence : red...
do you understand my bad english and poor french !

[Apprentice]

Indicator was revised and updated.