DeMarker indicator compares the most current price action to the previous period’s price to determine the demand of the instrument in question. Usually this indicator identifies price exhaustion and also can identify market highs and lows.
PURPOSE OF "DeMarker":
For most part, traders use DeMarker for indentifying the risk of the levels in which they place a transaction. Values over 60 are indicators of lower volatility and lower risk, when on other had reading lower than 40 usually indicates that risk is increasing.
UPDATES
Nov, 03 2010, ng: new feature:
1) Choice for smoothing method (MVA, EMA and so on)
2) Choice for line style
3) Choice for levels and level drawing styles
- DeMarker Screenshot.
DOWNLOAD:
(last version)
dem.lua- Download "DeMarker" Oscillator (new version).
- (4.54 KiB) Downloaded 1979 times
(previous version)
- Code: Select all
-- initializes the indicator
function Init()
indicator:name("DeMarker");
indicator:description("")
indicator:requiredSource(core.Bar);
indicator:type(core.Oscillator);
indicator.parameters:addGroup("Parameters");
indicator.parameters:addInteger("N", "Number of periods for smoothing", "", 14);
indicator.parameters:addString("MA", "Smoothing Method", "The methods marked by an asterisk (*) require the appropriate indicators to be loaded.", "MVA");
indicator.parameters:addStringAlternative("MA", "MVA", "", "MVA");
indicator.parameters:addStringAlternative("MA", "EMA", "", "EMA");
indicator.parameters:addStringAlternative("MA", "LWMA", "", "LWMA");
indicator.parameters:addStringAlternative("MA", "TMA", "", "TMA");
indicator.parameters:addStringAlternative("MA", "SMMA*", "", "SMMA");
indicator.parameters:addStringAlternative("MA", "Vidya (1995)*", "", "VIDYA");
indicator.parameters:addStringAlternative("MA", "Vidya (1992)*", "", "VIDYA92");
indicator.parameters:addStringAlternative("MA", "Wilders*", "", "WMA");
indicator.parameters:addGroup("Style");
indicator.parameters:addColor("C", "Color", "", core.rgb(0, 127, 127));
indicator.parameters:addInteger("W", "Width", "", 1, 1, 5);
indicator.parameters:addInteger("S", "Style", "", core.LINE_SOLID);
indicator.parameters:setFlag("S", core.FLAG_LINE_STYLE);
indicator.parameters:addGroup("Levels");
indicator.parameters:addDouble("Level1", "Low Risk Level", "", 0.6, 0, 1);
indicator.parameters:addDouble("Level2", "High Risk Level", "", 0.4, 0, 1);
indicator.parameters:addColor("LC", "Main level color", "", core.rgb(0, 127, 127));
indicator.parameters:addInteger("LW", "Main level width", "", 2, 1, 5);
indicator.parameters:addInteger("LS", "Main level style", "", core.LINE_DOT);
indicator.parameters:setFlag("LS", core.FLAG_LINE_STYLE);
indicator.parameters:addColor("LC1", "Aux level color", "", core.rgb(0, 127, 127));
indicator.parameters:addInteger("LW1", "Aux level width", "", 1, 1, 5);
indicator.parameters:addInteger("LS1", "Aux level style", "", core.LINE_DOT);
indicator.parameters:setFlag("LS1", core.FLAG_LINE_STYLE);
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()
assert(core.indicators:findIndicator(instance.parameters.MA) ~= nil, "Please download and install " .. instance.parameters.MA .. ".lua");
n = instance.parameters.N;
source = instance.source;
max = instance:addInternalStream(source:first() + 1);
min = instance:addInternalStream(source:first() + 1);
smax = core.indicators:create(instance.parameters.MA, max, n);
smin = core.indicators:create(instance.parameters.MA, min, n);
first = smax.DATA:first();
name = profile:id() .. "(" .. source:name() .. "," .. instance.parameters.MA .. "," .. n .. ")";
instance:name(name);
out = instance:addStream("DeM", core.Line, name .. ".DeM", "DeM", instance.parameters.C, first);
out:setWidth(instance.parameters.W);
out:setStyle(instance.parameters.S);
out:addLevel(0, instance.parameters.LS1, instance.parameters.LW1, instance.parameters.LC1);
out:addLevel(instance.parameters.Level2, instance.parameters.LS, instance.parameters.LW, instance.parameters.LC);
out:addLevel(0.5, instance.parameters.LS1, instance.parameters.LW1, instance.parameters.LC1);
out:addLevel(instance.parameters.Level1, instance.parameters.LS, instance.parameters.LW, instance.parameters.LC);
out:addLevel(1, instance.parameters.LS1, instance.parameters.LW1, instance.parameters.LC1);
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
Tags: DeMarker, indicator, Marketscope, oscillator, Trading Station, FXCM, dbFX
