Rather than dwell on mistakes, I'll show you how I would have played this along with several alternatives and you can take away what you like.
Remember first and foremost that it's all about buyers and sellers, not about lines and bars. However one chooses to illustrate the activity serves only to clarify what buyers and sellers are doing. The lines and bars themselves mean nothing.
First start with the daily, or at least the hourly. This places you in the trend (the most important element to know), or lack of it. From that point, you then know where to begin.
Here, the NQ has been in a trading range since the previous day. The fact that price breaks out of this range an hour before the NY open gives you an idea where the balance between buying pressure and selling pressure may lie.
About 40m before the open, price settles into a TR, but the TR holds above the TR that had been established since the previous day. This suggests that buyers have the upper hand. A few minutes after the open, price falls out of this range, which suggests weakness. But buyers push price back into the range, which indicates strength. On the third hand, buyers can't get past the midpoint of this range, which indicates weakness. If one likes, he can short this, placing the sellstop a point below the crest of the RET. Or he can wait and see if price exits the range and assess the situation at that point. If the trader does take the short, he'll be out of it quickly with a small profit.
Buyers then push price back into the range, an indication of strength. But, again, they can't push it past the midpoint, an indication of weakness. So, again, the trader can short if he wants to, even though the balance is anything but clear. When he sees that price finds S at the bottom of the TR, he must be prepared to exit at a small loss and take the opposite side of the trade, one pt above the trough of the RET. If he misses it, he'll have to wait until price exits from the TR and either buy the BO or wait for the subsequent RET. Either way, he needn't do anything further until price breaks the demand line (not drawn) at around 2976.
Once the demand line is broken, one looks for a short op off the first RET. This occurs where I've shown. However, immediately thereafter, price makes a HL, signaling a TR, and no more trades are taken until price exits this TR. It does so five minutes later and a long can then be taken off the first RET after the BO, one point above the trough of the RET. This is good for only a couple of points, but it's near quitting time anyway, and in any case one made up to 17pts off the first long.
And for those who have just tuned in, yes this is hindsight. But that's how analyses of prior days' trading are done. And the strategies and tactics have all been explored in exhaustive detail to the point where they have become a drill. The challenge is to forget all or nearly all of what one thinks one knows and adopt a fresh look at trader behavior. Game should be applauded for making this effort. Few people do.
Note that only one TR has been drawn and no demand or supply lines have been drawn. If anyone is interested, I'll be happy to plot them and upload a revised chart. However, if one can't see them even though they aren't drawn, he really ought to work on that. There really isn't enough time during RT trading to draw all this stuff.