That is the best strategy, there is no other , but of course here you have to have a lot of discipline , why? It is very easy to say it , but at the time of doing it , there are Players whose head is full of ideas , some are: why not bet a little more ? With that much , it is little that I am going to risk again , you should not pay attention to that type of Thoughts , because you are Breaking or Violating your own Rules , and this in the game, in trading , is the worst Thing you can do.
Having discipline is a must in gambling so we can prevents the lose becomes bigger. But not many gamblers knows or use their discipline to control themselves in gambling because gambling can attract them deeper and will spends more and more money. Even if they win, that doesn't mean they will stops their gambling activity because many of them will continue playing gambling to chase more winning.
If you break your own rules and use too much money for playing gambling, you will regret if you lose your money in gambling because that amount will be more than the money you can afford to lose. That is why you must always control your gambling activity and remember that gambling is just for fun and not for makes money so you can enjoy your time to playing gambling. And when you wins, you will withdraws the money because you thinks that is the real winning of gambling for you.