Daily SMA
This pine script on intraday chart is exactly the same SMA as built-in MovingAverage on a 1Day chart (with the same lengths)
//@version=2
// Use this script on intraday charts
study("Daily SMA", overlay=true)
src = input(close)
len = input(100)
s = security(tickerid, "D", sma(src, len), false)
plot(s)