Hi Anthony,
You cant upload your own EA. However, since you have the code for the strategy, one think you can do is to create a strategy with and enter your criteria as an entry and exit condition and see how to match it closely to your EA and use EA Studio robustness tool to see how you can tweak it there. Another thing is if you think your strategy is good then you can backtest in MT4 directly also and see if that helps.
Hope this helps. Nitin