For me i don't really welcome much losses, I try to make sure my trades are good enough and onset and if a trade gives me a loss I will check if I got enough equity I will do hold on the trades and be rest assured it will end up in profit. Well I think the amount of loss I can handle depends on the account size, if I got a bigger account then I can handle up to 3 or 4 loosing trades and if the market doesn't moves in my favor I will know such strategy isn't working for me any longer so I did change pattern of trading
There are different areas of your response here and I will respond all together. First, understand that losing is part of the trading business and a strategy that has been working for you to make profit does not need to be changed because of a loss, because such loss can be temporary. The market plays a funny one on the traders so that your effort looks rubbish to you. You can look deeper to understand is just market going wrong and not your strategy, it will get back to be corrected again after the volatility.
And holding up a losing trade is a waste of time for you because you will also get stocked as the trade, use stop loss, minimize your risk so that a lost trade can matter just little and you have another chance to trade.