BTC has repeatedly tested its support line in recent weeks. If it finally breaks down, there is minor support at the horizontal line below and major support at the dashed line that marks the breakout from the two-year downward trend.
The problem for anyone (such as me) who bought near that major support line is that a hard retest of the line could actually take us way BELOW the breakout point. This is because it's a diagonal breakout line, so we would be retesting at a later (and lower) point than where we initially broke out. For this reason, I may consider selling a breakdown from the current support line, rather than risking losing all my accumulated profit.