Do you know what the most important rule is in the field of Forex trading?  It is not about how to make money but how to make your losses as low as possible.  If you can find a way to minimize your trading losses as much as possible then you will still be in business when the market has been unkind to you.  Then when the trend turns around, you will be ready for that opportunity that comes your way.
Your next question would then be, how do you do this?  A wise trader will decide ahead of time on how much will be an acceptable loss and then stick to it. Knowing how much you are willing to loose per trade can be done based on your budget. You set it up in a way so that if you happen across a string of losses, it won’t stop you from trading for a period of time.
If you can manage this, then you will be one step ahead of about ninety percent of forex traders. It is those with no money management skills that will loose big time.  Without some type of management rules, you cannot have the limit that keeps your losses low.