desinging a ea for expert traders

i am wanting experienced traders views on what conditions a ea would have that not only makes a profit ;but you would have confidence in; even in draw down.i am testing some at moment and after many years buying robots and making my own;this is what i think could work.first eas or robots is the way to go.to those who say manual;why cant your idea be coded;almost anything can;and you cant watch screen all day.gut feeling only goes so far.if you are successful what profits could you be missing.?anyway this topic will be for ea;s. 1st rule is low drawdown;that is the most important.no good if ea has big profit with 99% drawdown.the best way to get low drawdown;is 50/50 risk reward ratio ..same stop loss as profit ;no trailing;no breakeven.seen a video of the best sporting betting syndicate in usa.they operate on 60% winning rate;spend millions on research each year.betting using same principle buying spread so each win equals loss.they say all they need is a slight edge to win.i think this makes sense in forex ;slight edge beat spread;52 % win rate;and you are in profit.no hiding behind different risk/reward.also this means lower drawdown over any other method.is hard to get 40% winners or less and if you do change numbers.but getting 60 % winners great.some trades will just miss profit;others just miss stop loss.should even out.with all the indicators on market ;can they get you a small edge on 50/50.i am trading using no indicators;just price and candle patterns.but this is you choice.number 2 rule;smallest take profit and stop loss the better.less drawdown again;also not too small as spread will effect profit.what other rules would you add to a ea like;from your experience trading and tips.always looking to learn more.

If the strategy isn't consistently profitable when trading manually, then automation isn't the answer to your solution.

Once you have a solution that works for YOU and your needs via manual trading, then create a detailed step by step set of rules for all aspects of your strategy, then automate it to trade exactly like your manual trading.

I know this sounds somewhat simplistic, but that is exactly what you need to do.