I am trying to plot yesterday high and low, but it return something different :
Code
function run()
{
	
	BarPeriod = 30;
	LookBack  = 0;
	
	
	asset("EUR/USD");
	

	
var session_high = dayHigh(UTC,1); //
var session_low = dayLow(UTC,1); // 
var session_pivot1 = dayPivot(UTC,1); // 


plot("USUTC-1 Session High Price", session_high, MAIN, GREEN); 
plot("USUTC-2 Session Low Price", session_low, MAIN, GREEN); 
plot("USUTC-3 Session Pivot", session_pivot1, MAIN, YELLOW); 

}

what is wrong with my code ?