Congratulations on your purported success. I fear for you, though -- as you appear *willfully* unaware that your exit=opposite_entry philosophy will lead you to financial ruin if you continue to follow its accidental, near-spurious success too far. The "test" which you think your system has passed, is no test at all -- it's small-sample bias, and demonstrates a lot more "experience" is needed. But I have to say, this made me smile: "And I don't trade trends, I predict them." Well of course you do. That belongs on a t-shirt. Doesn't e-trade have something like that? SuperTrades or some such?
risk reward probability are 3 things generally considered. but is probability the same thing as context?......context is either bull or bear for a particular time period....I say time period and not time frame because even on one time time frame chart, the area where bull resides and bear resides is clear and you take the buy or sell signal that corresponds to that context. identify the context and then wait for a good buy or sell signal. this I have found keeps you in the correct direction. this direction will change but it will be clear to you...it removes self doubt.
Do you mean you are currently profitable day trading a system on the 3 minute chart or do you mean you are still looking on developing a strategy? If the second is the case, why limit yourself to one time frame? You are testing, why don't you test multiple timeframes (as much as possible) to see if the strategy might perform better on a higher/lower timeframe?