Changing EMA to DEMA in a native strat (help please)

[Kris191]

I made the DEMA changes in the normal TMA config and it hangs on backtest then fails with no output in the console, I have no idea what (surprise surprise), any ideas that i can try, if i change EMA to SMA it works but not going from EMA to DEMA.

If you need more info please let me know and i will happily provide it.

EDIT: also works if i change it to WMA