A quick look at the plot says a couple of things:

* You let your winners run. This is good.
* Once you have a trade that draws down more than 1.1% of your position, you never have a winning trade. You can add one more filter to improve risk management. May I offer a suggestion? Close your trades when you have 1.0% nominal position drawdown, and optimize it for 0.5% to 1.5% position drawdown.
* After you make the above adjustment, re-plot.

As it says in the book Trading Systems by Tomasini and Jaekle, your losses are within your realm of control and not your profits. Yet, it is by controlling your losses that you will create more opportunities for profit.