//+------------------------------------------------------------------+ //| AggZ.mq4 | //| Copyright ?2010, Walter Choy | //| [email protected] | //+------------------------------------------------------------------+ #property copyright "Copyright ?2010, Walter Choy" #property link "[email protected]" // The calculation is simple: // // AggZ = (-1*(10-day z-score)+(200-day z-score))/2 // // where z-score = (close - sma(closing prices over last n periods))/(standard deviation(closing prices over last n periods)) // // buy above 0, sell below 0 as a basic strategy. #property indicator_separate_window #property indicator_buffers 1 #property indicator_color1 OrangeRed //---- input parameters extern int fast_z_period=10; extern int slow_z_period=252; //---- buffers double AggZBuffer; double z_score_fast; double z_score_slow; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int init() { //---- indicators IndicatorBuffers(3); SetIndexStyle(0,DRAW_HISTOGRAM); SetIndexBuffer(0,AggZBuffer); SetIndexLabel(0, "AggZ"); SetIndexDrawBegin(0, slow_z_period); SetIndexBuffer(1,z_score_fast); SetIndexBuffer(2,z_score_slow); IndicatorShortName("AggZ ("+fast_z_period+","+slow_z_period+")"); //---- return(0); } //+------------------------------------------------------------------+ //| Custom indicator deinitialization function | //+------------------------------------------------------------------+ int deinit() { //---- //---- return(0); } //+------------------------------------------------------------------+ //| Custom indicator iteration function | //+------------------------------------------------------------------+ int start() { int counted_bars=IndicatorCounted(); int i, j; double std_fast, std_slow, ma_fast, ma_slow; //---- i = Bars - counted_bars - 1; j = i; while(i>=0){ // z-score = (close - sma(closing prices over last n periods))/(standard deviation(closing prices over last n periods)) ma_fast = iMA(NULL, 0, fast_z_period, 0, MODE_SMA, PRICE_CLOSE, i); std_fast = iStdDev(NULL, 0, fast_z_period, 0, MODE_SMA, PRICE_CLOSE, i); if (std_fast > 0) z_score_fast = (Close - ma_fast)/std_fast; ma_slow = iMA(NULL, 0, slow_z_period, 0, MODE_SMA, PRICE_CLOSE, i); std_slow = iStdDev(NULL, 0, slow_z_period, 0, MODE_SMA, PRICE_CLOSE, i); if (std_slow > 0) z_score_slow = (Close - ma_slow)/std_slow; i--; } while(j>=0){ // AggZ = (-1*(10-day z-score)+(200-day z-score))/2 AggZBuffer[j] = (-1 * z_score_fast[j] + z_score_slow[j]) / 2; j--; } //---- return(0); } //+------------------------------------------------------------------+AggZ.jpg