$BTC From a technical perspective, short-selling forces are dominant. The four-hour K-line chart shows that the positive rebound in the previous two days failed to continue and was immediately suppressed by short sellers, with two consecutive negative lines. The price was constrained by the middle track of the Bollinger Bands and it was difficult to break through upward. Combined with the fact that the overall downward trend has not reversed significantly and the bulls have tried many times to attack the key resistance level but failed to break through effectively, it indicates that the downward trend is likely to continue. In the one-hour K-line chart, the market fell below the middle track of the Bollinger Bands with three consecutive negative lines, further confirming the release of short-term short-selling momentum and showing that the short-selling forces are actively exerting their strength.