Sum of first 70 minutes volume

Hey, Guys i hope you are doing absolutely fine.

i wanna ask you that if i would like to calculate sum of first 70 minuit candle volume from the day open. so how can i do it, please help me to out.

i've tried below code..

tm1 = TimeNum() >= 091500;
tm2 = TimeNum() <= 110500;
newday = Day() != Ref(Day(),-1);


Volh = Sum( V, BarsSince(newday)) 
Plot(volh,"volh",colorWhite,styleNoDraw);


Would request you to test the below before using. The code is market open time independent, so, you can change the StrtTime/EndTime as per your requirement.

// Coded by Lennon for https://forum.amibroker.com/t/sum-of-first-70-minutes-volume/6410
_SECTION_BEGIN( "nPeriod Volume" );
	 StrtTime = 91500;
	 EndTime = 110500;

	 tn = TimeNum();
	 CondStrtTime = tn >= StrtTime;
	 CondEndTime = tn <= EndTime;
	 cond = CondStrtTime AND CondEndTime;
	 
	 dt = DateTime();
	 _StartDt = DateTimeConvert( 2, DateNum(), StrtTime );
	 _EndDt = DateTimeConvert( 2, DateNum(), EndTime );
	 
	 bi = BarIndex();
	 _StartBI = Lookup( bi, SelectedValue( _StartDt ) );
	 _EndBI = Lookup( bi, SelectedValue( _EndDt ) );
	 per = _EndBI - _StartBI;
	 
	 sV = 0;
	 for( i = 0; i < per; i++ )
	 {
		 sV = IIf( cond, sV + V[ _StartBI + i ], Null );
	 }
	 
	 Plot( sV, "nPeriod Volume", colorWhite, styleLine );
	 
	 Filter = 1;
	 AddColumn( V, "Volume", 1.0 );
	 AddColumn( sV, "nPeriod Volume", 1.0 );
_SECTION_END();
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