stability is the first and most important fact for an acceptable EA.
Risk reward: its must be 1:1.2 at least for each position ( if lot sizes calculation is whole account: lot size * 700Pips on EURUSD)
backtest is just a key for start forward test. no more, never trust any Backtests.
it Must use Multi Close to Close all open positions in a specific risk level , to secure funds from market tick shadows and High frequencies.