Four common entry forms for "Breakthrough Step Back": 1. Support resistance exchange and retracement: Breaking through at a high point before returning without breaking, confirming the support is established, which is the most basic and common way to enter the trend breakthrough market. 2. Trend line breakthrough and retracement: After the downward trend is broken, the price retraces near the trend line to form support, which is the most difficult breakthrough signal to enter. 3. Exchange of support and resistance in oscillating structures: the most prone form to false breakthroughs. The Ethereum ETH trend on June 10th is a typical example. 4. Convergence triangle breakthrough test: Whether breaking upwards or downwards, the first step back on the triangle boundary position is a key direction confirmation point.