//+------------------------------------------------------------------+
//| ARSI.mq4 |
//| Copyright ?2009, Walter Choy |
//| |
//+------------------------------------------------------------------+
#property copyright "Copyright ?2009, Walter Choy"
#property link ""
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1 Blue
//---- input parameters
extern int period = 9;
extern int histper = 30;
double VIDYA[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
//---- indicators
SetIndexStyle(0,DRAW_LINE);
SetIndexBuffer(0,VIDYA);
SetIndexLabel(0, "VIDYA");
SetIndexDrawBegin(0, histper);
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function |
//+------------------------------------------------------------------+
int deinit()
{
//----
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{
int counted_bars=IndicatorCounted();
int i;
double sc, k;
//----
i = Bars - counted_bars;
while (i>0){
if (i < Bars - histper)
{
k = iStdDev(NULL, 0, period, 0, MODE_SMA, PRICE_CLOSE, i) / iStdDev(NULL, 0, histper, 0, MODE_SMA, PRICE_CLOSE, i);
sc = (2.0 / (period + 1));
VIDYA[i] = k * sc * Close[i] + (1 - k * sc) * VIDYA[i+1];
} else {
VIDYA[i] = Close[i];
}
i--;
}
//----
return(0);
}
//+------------------------------------------------------------------+
Sample
Analysis
Market Information Used:
Series array that contains close prices for each bar
Indicator Curves created:
Implements a curve of type DRAW_LINE
Indicators Used:
Standard Deviation indicator
Custom Indicators Used:
Order Management characteristics:
Other Features: