Wait to see if 3/13 low can hold.
If it can not hold, we have possiblity to go much lower, and you may want to wait on the sideline just for market to stablize before getting in. Once we get to that situation, I am sure there will be several potential entry points into the market
If it can hold and we bounce above last Friday's high (just to give you enough safety net), you have a higher probability to catch an uptrend by entering market at that time.
Otherwise, follow 均線兄的建議定投