To help preserve capital a good stop loss would be at the 0.236 fib extension. In none of the previous retracements has the 0.236 been touched, so this can be a good price to start some trailing stop losses.
To reach previous support we would need to drop to approximately $900. Once we hit the today, we quickly shot back up to $1,200 despite having attributable reason for the correction. That is a strong signal of strong support.
We have not touched the top of our yet - another strong sign.
We have always touched our support after an ATH , another strong sign.
There is only based on Korea news, and the diverging to indicate possible market reversal.
It is difficult to know how the market will respond, but this is why we set a trading plan and evaluate it constantly. Keep your eyes open for the market trending away from your plan, but for now everything appears normal and healthy. However, it wouldn't be surprising to completely retrace down on this news, so keep your stop losses accordingly to protect capital.