//+------------------------------------------------------------------+
//| LaguerreFilter.mq4 |
//| |
//| Laguerre Filter |
//| |
//| Algorithm taken from book |
//| "Cybernetics Analysis for Stock and Futures" |
//| by John F. Ehlers |
//| |
//| contact@mqlsoft.com |
//| http://www.mqlsoft.com/ |
//+------------------------------------------------------------------+
#property copyright "Coded by Witold Wozniak"
#property link "www.mqlsoft.com"
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Red
#property indicator_color2 Blue
extern double Gamma = 0.8;
double Filter[];
double FIR[];
double L0[];
double L1[];
double L2[];
double L3[];
int buffers = 0;
int drawBegin = 0;
int init() {
drawBegin = 4;
initBuffer(Filter, "Laguerre Filter", DRAW_LINE);
initBuffer(FIR, "FIR", DRAW_LINE);
initBuffer(L0);
initBuffer(L1);
initBuffer(L2);
initBuffer(L3);
IndicatorBuffers(buffers);
IndicatorShortName("Laguerre Filter [" + DoubleToStr(Gamma, 2) + "]");
return (0);
}
int start() {
if (Bars <= drawBegin) return (0);
int countedBars = IndicatorCounted();
if (countedBars < 0) return (-1);
if (countedBars > 0) countedBars--;
int s, limit = Bars - countedBars - 1;
for (s = limit; s >= 0; s--) {
L0[s] = (1.0 - Gamma) * P(s) + Gamma * L0[s + 1];
L1[s] = -Gamma * L0[s] + L0[s + 1] + Gamma * L1[s + 1];
L2[s] = -Gamma * L1[s] + L1[s + 1] + Gamma * L2[s + 1];
L3[s] = -Gamma * L2[s] + L2[s + 1] + Gamma * L3[s + 1];
Filter[s] = (L0[s] + 2.0 * L1[s] + 2.0 * L2[s] + L3[s]) / 6.0;
FIR[s] = (P(s) + 2.0 * P(s + 1) + 2.0 * P(s + 2) + P(s + 3)) / 6.0;
if (s > Bars - 4) {
L0[s] = P(s);
L1[s] = P(s);
L2[s] = P(s);
L3[s] = P(s);
Filter[s] = P(s);
}
}
return (0);
}
double P(int index) {
return ((High[index] + Low[index]) / 2.0);
}
void initBuffer(double array[], string label = "", int type = DRAW_NONE, int arrow = 0, int style = EMPTY, int width = EMPTY, color clr = CLR_NONE) {
SetIndexBuffer(buffers, array);
SetIndexLabel(buffers, label);
SetIndexEmptyValue(buffers, EMPTY_VALUE);
SetIndexDrawBegin(buffers, drawBegin);
SetIndexShift(buffers, 0);
SetIndexStyle(buffers, type, style, width);
SetIndexArrow(buffers, arrow);
buffers++;
}
Sample
Analysis
Market Information Used:
Series array that contains the highest prices of each bar
Series array that contains the lowest prices of each bar
Indicator Curves created:
Implements a curve of type type
Indicators Used:
Custom Indicators Used:
Order Management characteristics:
Other Features: