Hi, i try find out why my result of volume is different from history in same TF, maybe any one can help ?
Data history is SPY t6 in 1 min time frame include Vol per Bar.
in Zorro History Viewer are Vol prints Volume O.K.
SPY data History Download is available here.

Example code
Code
function run() 
{
		  set(LOGFILE+PLOTNOW);		 
		
		  Verbose = 3;
		  TickFix = 1;   
                  StartDate = 20200616;
                  EndDate = 20200617;
			  
		  BarPeriod = 1;  // same as History (RAW)
		
                  asset("SPY");

                       // vars Prices = series(priceClose()); 
		   
		vars Vol = series(marketVol());
		
                plot("MarketVol",Vol,BARS|NEW,BLUE);  
		
}



for Example result, check attachment, them display difference between History and Result.
Anyone know a way to resolve this problem?


Attached Files
2020-06-21 23_46_53-Window.png (117 downloads)
Last edited by TedMar; 06/21/20 22:29.