#交易策略误区 Countless traders easily fall into trading traps: using charts to create strategies, taking a typical market trend chart and then formulating trading strategies based on this chart, setting their own entry signals and exit signals, etc. For example, we find a bullish market trend chart and look for a moving average, such as the 30-day moving average. The price rises along the 30-day moving average, so we conclude that the 30-day moving average is useful, indeed very useful, and we adopt the 30-day moving average as our trading system: entering when it breaks above the 30-day moving average and exiting when it falls below the 30-day moving average. This kind of thought trap can easily confuse countless people, making it impossible for them to identify the root cause of their trading problems.

The reason this logic is incorrect is essentially that you inadvertently included a future function, i.e., a premise condition, where you already know the future market trend, which affects the formulation of your current trading strategy.