//+------------------------------------------------------------------+ //| Instantaneous Trendline.mq5 | //| | //| Instantaneous Trendline | //| | //| Algorithm taken from book | //| "Cybernetics Analysis for Stock and Futures" | //| by John F. Ehlers | //| | //| contact@mqlsoft.com | //| http://www.mqlsoft.com/ | //+------------------------------------------------------------------+ //---- author of the indicator #property copyright "Coded by Witold Wozniak" //---- author of the indicator #property link "www.mqlsoft.com" //---- indicator version #property version "1.00" //---- drawing the indicator in the main window #property indicator_chart_window //---- two buffers are used for calculation and drawing the indicator #property indicator_buffers 2 //---- two plots are used #property indicator_plots 2 //+----------------------------------------------+ //| ITrend indicator drawing parameters | //+----------------------------------------------+ //---- drawing the indicator 1 as a line #property indicator_type1 DRAW_LINE //---- red color is used as the color of the bullish line of the indicator #property indicator_color1 Red //---- the indicator 1 line is a continuous curve #property indicator_style1 STYLE_SOLID //---- thickness of the indicator 1 line is equal to 1 #property indicator_width1 1 //---- displaying the bullish label of the indicator #property indicator_label1 "Instantaneous Trendline" //+----------------------------------------------+ //| Trigger indicator drawing parameters | //+----------------------------------------------+ //---- drawing the indicator 2 as a line #property indicator_type2 DRAW_LINE //---- blue color is used for the indicator bearish line #property indicator_color2 Blue //---- the indicator 2 line is a continuous curve #property indicator_style2 STYLE_SOLID //---- thickness of the indicator 2 line is equal to 1 #property indicator_width2 1 //---- displaying the bearish label of the indicator line #property indicator_label2 "Trigger" //+----------------------------------------------+ //| Horizontal levels display parameters | //+----------------------------------------------+ #property indicator_level1 0.0 #property indicator_levelcolor Gray #property indicator_levelstyle STYLE_DASHDOTDOT //+----------------------------------------------+ //| Indicator input parameters | //+----------------------------------------------+ input double Alpha=0.07; // Indicator ratio input int Shift=0; // Horizontal shift of the indicator in bars //+----------------------------------------------+ //---- declaration of dynamic arrays that //---- will be used as indicator buffers double ITrendBuffer[]; double TriggerBuffer[]; //---- declaration of the integer variables for the start of data calculation int min_rates_total; //---- declaration of global variables double K0,K1,K2,K3,K4; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ void OnInit() { //---- initialization of variables of the start of data calculation min_rates_total=8+3; //---- initialization of variables double A2=Alpha*Alpha; K0=Alpha-A2/4.0; K1=0.5*A2; K2=Alpha-0.75*A2; K3=2.0 *(1.0 - Alpha); K4=MathPow((1.0 - Alpha),2); //---- set ITrendBuffer[] dynamic array as an indicator buffer SetIndexBuffer(0,ITrendBuffer,INDICATOR_DATA); //---- shifting the indicator 1 horizontally by Shift PlotIndexSetInteger(0,PLOT_SHIFT,Shift); //---- performing shift of the beginning of counting of drawing the indicator 1 by 3 PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,3); //---- set TriggerBuffer[] dynamic array as an indicator buffer SetIndexBuffer(1,TriggerBuffer,INDICATOR_DATA); //---- shifting the indicator 2 horizontally by Shift PlotIndexSetInteger(1,PLOT_SHIFT,Shift); //---- performing shift of the beginning of counting of drawing the indicator 2 by 3 PlotIndexSetInteger(1,PLOT_DRAW_BEGIN,3); //---- initializations of a variable for the indicator short name string shortname; StringConcatenate(shortname,"Instantaneous Trendline(",Alpha,", ",Shift,")"); //---- creation of the name to be displayed in a separate sub-window and in a tooltip IndicatorSetString(INDICATOR_SHORTNAME,shortname); //---- determination of accuracy of displaying the indicator values IndicatorSetInteger(INDICATOR_DIGITS,_Digits); //---- } //+------------------------------------------------------------------+ //| Custom indicator iteration function | //+------------------------------------------------------------------+ int OnCalculate(const int rates_total, // number of bars in history at the current tick const int prev_calculated,// number of bars calculated at previous call const datetime &time[], const double &open[], const double& high[], // price array of maximums of price for the indicator calculation const double& low[], // price array of minimums of price for the indicator calculation const double &close[], const long &tick_volume[], const long &volume[], const int &spread[]) { //---- checking the number of bars to be enough for the calculation if(rates_totalrates_total || prev_calculated<=0) // checking for the first start of the indicator calculation { first=3; // starting index for calculation of all bars } else first=prev_calculated-1; // starting index for calculation of new bars //---- main indicator calculation loop for(bar=first; bar