Trailing Stop Order in Fiat Currency

I lately found the Trailing Cease Order on the Binance Spot Trading Platform.

I actually assume that this is a tremendous Software which may save me some huge cash if used regularly.

The only situation I have with the trailing stop order, is that I have to settle for a hard and fast quantity of Crypto I need to purchase. This bothers me as I need to expend all my Fiat money. For example if the worth falls more then expected, I'll buy some fastened amount of Crypto leaving my with some leftover Fiat Money.

Does anybody know whether it is potential to put a trailing stop in Fiat ? Will it's potential within the Future ?

I might be curious to understand how more superior traders handle this ?