Of course, if price breaks below, we can’t do anything as EvE does not support short selling. In real life trading, we would wait for a setup as shown as in the picture (the red arrows).
However, even if EvE does not support short selling, this knowledge is still useful. If price breaks that trend line and retraces to it, this means the bearish move is confirmed and we should really dump our remaining stock before it’s too late!