Sometimes the trades that turn out best are psychologically the hardest to make. It can be hard to short new lows and buy new highs because you keep telling yourself how much more you could have made had you already been long or short from a better price and wonder how much longer it can keep going in that direction. The way I deal with that thought is to remind myself that price is just a number that can go up or down from any point, and if it's likely to go down still more (and the obvious negative reaction to the Fed cut put the odds way in your favor on that one!), the only correct action is to go short right then and there. Mentally, you tend to compare price now with where it's been in the past and judge it on that basis, but that is often very deceiving. What's really important of course is where price is likely to go in the near future, and that can always mean still lower or still higher. You'll never get everything that's possible out of the market, just remind yourself to go ahead and do the best you can with what's being made available right now.