According to the standard rules of classical technical analysis, once the price movement from the first high point to the apex exceeds 70%, it can no longer be considered a valid symmetrical triangle. So what's the problem? Once in this situation, upward or downward breakouts become hard to trust. $NQ_F is a real-life example—appearing to break out, but in fact, the reliability of breakout signals under this pattern is significantly reduced. This is especially important for short-term traders, so don't be fooled by seemingly "perfect" charts.