According to my way of analysis, Sembmar is in an uptrend. but for now, price is having a pull back. Generally, it is not advisable to keep the short position for long term, better look out to cover back when price found some support.
For those who is clear in mind that this is a short term trade, the question is when to cover back. I personally feel the sembmar may start consolidation or even rebound, may consider cover back gradually