We need to make use of a trading system that is more reliable for us and will help us in earning a stable income from this business. If the trading strategy we are using is not profitable then we can easily change it. We need to keep discipline in our trading so that our income from this business can increase.
Yes, a trader should know that when to change the strategy, if he loses and still continue to use the same strategy, than it will consider foolishness. Thus we need to change strategy time to time.
