AS AN EXAMPLE YOU CAN RUN FOR YOURSELF:
BTCUSD
Comparison: 1D and 12H
Flip Heiken Ashi values on and off for both and compare
1D is profitable using HA, but 12H is MUCH more profitable using normal values instead (like 3-4x more)
Comparison: 1m
Flip Heiken Ashi values on and off
HA makes scalping less profitable, but smooths things out so there are less trades and potentially less fees depending on where you're trading
(Usually HA has 60% of the trade count compared to using normal candles)