Using an EA based on variable grid depending on volatility, only buys on usdchf due to better positive swap. As for risk management I use 0.01 lot for every 2000 in balance. If you are using a smaller leverage than me, the risk will be increased, or you should have more funds than me, proportionally with your leverage, if for example your leverage is 1:200 (FXChoice) the minimum balance to have the same risk as me should be 500:200x2000=5000 . I do not use stop losses, the stop loss is the account itself and a good money management will help it to survive in all market conditions.