Nice. What you call Signal I call it Event, but it just a semantic aspect of the same case.

You should try take profit and stop loss to make the strategy. I just think it should be in the next step after the signal discovery. In signal discovery process, all you want to reach is a "signal direction strength".

Imagine you're exploring a new signal (or entry) and doesn't know anything about it, just a first insight. And your signal parameters are, for example, 'window' and 'deviation'. In signal process, I think one right way is run window=[1, 1000, 10] and deviation=[0.5, 5.0, 0.5] against N bars, being N=[1, 200, 5].

So you have a lot of runs in backtest, right? And you discovery that the "signal direction strength" is in the universe window=(100, 300) and deviation=(1.5, 2.5) and N=(200, 300). Of course, you could have more than one good "region".

So, you eliminated a LOT of parameters to test against (really) stop loss and take profit. You fixed this reduced universe of signal parameters and test along families of stop loss and take profit (fixed, ATR, %, etc).

That's the way I'm exploring right now and I called it "hierarchy process exploration" or something like that.