/* * Filename: VSI.mq4 * Author: DriverDan * Date: Oct 20, 2005 * * Description: Indicator that calculates volume per second (or period) and the corresponding MA. * Uses volume per second since it will be uniform for all chart periods. * Indicator seems to work best on 15m to 4h charts. IMHO, 1m and 5m periods are * too short for valid results and 1d+ will show low periods for partial days on MT4. * * Version: 1.0 * Initial release */ #property copyright "Copyright 2005, DriverDan" #property link "superfunman2000@yahoo.com" #property indicator_separate_window #property indicator_minimum 0 #property indicator_buffers 2 #property indicator_color1 DodgerBlue #property indicator_color2 Red #define SECINMIN 60 //Number of seconds in a minute extern int vsiMAPeriod = 7; //Period for the moving average. extern int vsiMAType = 1; //Moving average type. 0 = SMA, 1 = EMA, 2 = SMMA, 3 = LWMA extern int showPerPeriod = 0; //0 = volume per second, 1 = volume per chart period /* Volume per second allows you to compare values for different chart periods. Otherwise the values it will show will only be valid for the chart period you are viewing. The graph will look exactly the same but the values will be different. */ double vsiBuffer[]; double vsiMABuffer[]; /** * Initialization function */ int init() { string vsiTitle = "VSI(" + vsiMAPeriod + ")"; SetIndexStyle(0,DRAW_LINE); SetIndexStyle(1,DRAW_LINE); SetIndexBuffer(0, vsiBuffer); SetIndexBuffer(1, vsiMABuffer); IndicatorShortName(vsiTitle); SetIndexLabel(0, vsiTitle); SetIndexLabel(1, "vsiMA(" + vsiMAPeriod + ")"); SetIndexDrawBegin(1, vsiMAPeriod); return(0); } /** * Main program */ int start() { int i, limit, timeDiff; int counted_bars = IndicatorCounted(); if(counted_bars >= 0) { //If counted bars is greater than zero we must subtract 1 so we get in the right position if(counted_bars > 0) { counted_bars--; } //Only count bars we haven't already drawn limit = Bars - counted_bars; for(i = 0; i < limit; i++) { //Difference between the current time and the bar start timeDiff = CurTime() - Time[i]; //If we are in the current bar and the tick doesn't fall exactly on the '00:00' min & sec if(i == 0 && timeDiff > 0) { vsiBuffer[i] = Volume[i] / timeDiff; } else { //Otherwise calculate the total bar volume divided by the total bar seconds vsiBuffer[i] = Volume[i] / (Time[i - 1] - Time[i]); } if(showPerPeriod == 1) { vsiBuffer[i] = vsiBuffer[i] * Period() * SECINMIN; } } //Fill the moving average buffer for(i = 0; i < limit; i++) { vsiMABuffer[i] = iMAOnArray(vsiBuffer, Bars, vsiMAPeriod, 0, vsiMAType, i); } } return(0); }