Without regard for context, note that the premkt is a range. Until price is able to exit that range, there's little or nothing to be gained and more likely something to be lost if one attempts to enter a trade.
Price does exit the range right after the open, and a short is justified. However, the trader should note that price reverses immediately and he should therefore exit immediately. After he does, price returns to the range.
During the next exit, price even makes a lower low, but, again, price reverses immediately (this is much easier to see with a smaller interval, e.g., 15s), so the trader must again exit immediately. After he does, price returns to the range.
It isn't until 0853 that price exits the range and stays there. However, at 0858, price can't make the higher high and the trader has again to exit.
At 0901, price fails a third time to make a higher high and also breaks the support line. This leads to a shorting op. That one already has three unproductive trades by now and a half hour has gone by may be dispiriting, but that's the way it goes. One can't think about that right now. The shorting op is good, so it has to be taken. Everybody else is just as impatient as you are. This can be held until after 0920 (a 9pt trade +/-), when price makes a double bottom and the resistance line is broken.
When the next support line is broken (not drawn) at 0935, the first reaction might be to look for a shorting op. But note how strongly price rejects 2828 in the next bar. This doesn't necessarily mean automatically go long, but it does suggest that one should exercise extreme caution about trying a short. If one doesn't take this long, there's another entry four bars later.
If you're watching price move, pay close attention to what it does between the "open" and the "close" of the bar. If that presents difficulties, open up a shorter interval on the side so you can better see just what it is that price is doing, even though you may not want to use it for entries.
http://cdn3.traderslaboratory.com/f...262450-re-trading-off-daily-charts-image3.png