Saved as .js just for adding some color to it. No repainting function for Pinescript 5.0

norepaint.js

//@version=5

// === No repainting.
f_nrp(_timeframe, _expression) =>
    // request.security(symbol=syminfo.tickerid, timeframe=_timeframe, expression=_expression[barstate.isrealtime ? 1 : 0], gaps=barmerge.gaps_off)[barstate.isrealtime ? 0 : 1] // PineCoders best practice.
    request.security(symbol=syminfo.tickerid, timeframe=_timeframe, expression=_expression[1], lookahead = barmerge.lookahead_on)

// Use
ema_expression = ta.ema(low, ema_length)
// Get values using anti-repainting
ema_quick_nrpvalue = f_nrp(ema_quick_resolution, ema_quick_expression)

// Then plot
plot(ema_quick_nrpvalue)