Quote from MaxMin:
Interesting idea. However I disagree with the conclusion. Disagreement isn't a bad thing and if I am wrong I would like to find out and adjust my thinking.
Taking your example we assume the original long entry price is 100, the target is 110 and let's assume a stop loss of 95. For our purposes let's assume that we somehow know that this particular setup hits the profit target 40% of the time and the stop 60% of the time.
Now let's jump into the example where the setup has already occurred at 100, and price is now trading at 106. It is obvious that if we took an entry from 106 and rode it to the 110 target we would have 4 points of profit, and if it rode down to the 95 stop loss we would have 11 points of loss if we entered from this point and used the original stop and target points. This is clearly less than the 10 points of profit and the 5 points of loss dictated under our original risk/reward scenario. However I don't think this is what you are saying.
I think you're saying that at 100 we had a 40% chance to get to 110, and at 106, we still have a 40% chance to get to 110. I would dispute this point, citing the fact that the change in proximity to our target also unavoidably will change the likelihood of our reaching that point. For instance if we test entry every bar with a 5 point stop and a 10 point target, we will have a lower win percentage than if we test every bar with a 11 point stop and a 4 point target. The closer target is just more likely to get hit due to the normal fluctuations. You see, I don't believe in static probabilities in the market. I believe that the probabilities are constantly in motion. If we assume that we are now trading at 109.50 I'm sure you will agree that the probability of hitting 110 is much higher at that point than it was when price was 100.
I'm looking forward to hearing your arguments and clarifications as a very thoughtful member of this site.