Code to exclude extended hours for SMA on a 10minute chart going back 500 lengths?

[Thebtrader]

Would this work?

def isopen=if secondsFromTime(0930)>=0 and secondstillTime(1600)>=0 then 1 else 0;

Plot SMA = if isopen = 1 then SimpleMovingAvg(Close,500,0,no) else 0;

 

[BenTen]

You can just turn off extended hours from your chart's settings.