QantDean:
The issue with limit orders is that there is no way that you can be assured that you get a limit order fill. There is no question that strategies
that I develop have significant better performance, but how am I to be assured that the back test and walk forward are truly representative of the
strategy performance going forward into the unknown. This is especially significant in low volatility (like now).
My development philosophy is not to try to get the "best" system but I try to see how any system can fail. Limit orders add a significant error into
development work, at least for me, especially with swing systems. I much rather develop a Day trading or swing system with full slippage and
commissions using only market orders. This is the most conservative case. Then if you want to add a limit order component to the system (say for
adding another contract) you are assured that the basic system does not have any "gotchas". I can't tell you how many limit order systems that I have
developed where the performance is dominated by a few large trades where the system gets the absolute top or bottom of the move. Of course, you may
only have a 10% chance of getting that price and if you miss these few moves, the strategy is not very good.
This is my opinion only and what works for you can be different, but I want to make sure that any of my back testing, sensitivity analysis, and walk
forward studies, I can be assured statistically that I will get a fill.
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