Short on IBM for 5% dip

Decreasing triangle here in a downtrend. Getting a short position here around 148, looking for a dip to at least 140 (where we found a few time resistance lately). Did so with a IBM SL 165.60 HB 4.49 FN 179.07 R 10.00 BNP Paribas Turbo Short. Little margin between the most recent peaks before this triangle and the Stop Loss level.

Target is a 20/25% ROI before the end of the year.