Not sure is fine. Not sure is a good beginning.
Consider that the current trend began on August 24 (actually it began seven years ago, but . . .). The next swing low is September 29. If one entered down there, he'd have every right to feel smug and self-satisfied. But neither would he want to experience a 350pt downdraft to his starting point.
A more practical and realistic place to start is the swing low on 9/29 and use yesterday's swing low to draw your DL. The later you enter, the higher your price risk, and any entry around here is very late. There is therefore no rationale for being a hero. But it's important to judge the market by its own action and exit when it tells you to rather than sweat over one's entry and how much at risk his profits are. Focusing on the latter almost guarantees that the wrong decision will be made.
Once this is drawn, you'll see that the DL crosses the vertical axis at about 4360, which is just below the entry for the long. During the next session, unless everything goes to hell over the next five hours, this intersection will be at or about 4380. An exit here would provide a profit. But would that profit be all there is? Is a break of the DL at 80 "important"? (By Monday, barring a significant disruption, the intersection will be about 30-40pts higher.)
Therefore, where and how will the market tell you that longs are in trouble? At what point or level is it more prudent to exit, stand aside, and let everybody work things out before you make another entry decision, and what can you do to ensure that you're focusing on the market and not on your own fears?