I did not short CRSR wasn't monitoring it, however it was a good objective short thus I'm posting a couple of charts for educational purposes.

First the daily chart was clearly in an unsustainable parabolic move. Heck you have a VERY rare condition here with the last 6 candlesticks closing above their upper Bollinger Bands, with the last one opening completely outside of the bands. Anyway one trigger that Steve and I teach is that when you have an extended move, if you have a mostly solid candlestick you can get an objective trigger at 50% of that candle range with an initial stop at the high or low of the candle. In this case you had a solid candle, with a short trigger of approximately 49, and initial stop at 51.4. The initial target is always the 9 EMA and that was hit soundly.  Steve and I prefer to trigger off a doji like candle, however if you have a mostly solid candle then 50% of that candle's range is a trigger.

Next on the 15 min chart you had clear MACD and RSI divergence as well as a wedge.