Don't treat all W bottoms the same; double bottoms also have different levels of patterns. A double bottom ≠ a single chart template; there are various paths of evolution behind it. Understanding the details is crucial to determine whether this "bottom" is reliable or not. The image shows four typical "double bottom patterns": 1. Standard Double Bottom Two low points are close together, and the rhythm is symmetrical, making it the most classic and easily recognizable double bottom structure. 2. Curved Type The first rebound is relatively weak, and the trend is more curved, commonly seen in the emotional recovery phase after a significant drop; confirmation of a reversal is key. 3. Left Side Consolidation Type The first leg of the bottom has a longer horizontal consolidation period, indicating that the main force is patiently accumulating; acceleration is common after a breakout. 4. Consolidation Double Bottom Both legs are accompanied by horizontal fluctuations, and the entire pattern resembles a "consolidation zone bottom"; once a valid breakout occurs, the subsequent trend is cleaner. Regardless of the pattern, the neckline breakout is the trigger point for trading; if it breaks out and then retests without breaking the neckline, it is key to increasing confidence in holding positions.