Clearly any dollar cost averaging approach has increased costs re Brokerage.

But to my mind it does help manage risk, and risk adjusted returns are what I seek.

No system is perfect, and what I currently do isn't either.
(I continue to do back-testing etc., and the system gives me some confidence - but often times find backtesting can lead me into analysis paralysis with Betas, Sharpe Ratios and the like!).

When things go against me, I have typically not spent the dollars on additional brokerage, so under those scenarios the trade is akin to a simple entry/exit at 1/4 the desired position.

I hope this helps some folks, and I can add no more to give insights as there is nothing more material to add!

Please feel free to add your experiences with respect to how you manage breakout entry / exits so that we an all learn

Best Wishes to all.