Quote from Lefty62151:
Hello:
I get a bit dubious when people with 600+ posts ask about taking profits.
The way you decide profit taking is to study your market history. You look at the entry signal(s) your system generates and characterize the profit obtained on a per trade basis vs what you leave "on the table". You want to see if the unrealized profit displays a cyclic quality or is it approximately the same throughout the year. Either way you have important information that you can use. You then adjust your trade exit by modifying your stop or choosing one of several types of stops (parabolic, stop and reverse, etc), testing to see how each change affects your profitability.
The best example of how to test comes from the work of Donna McCormick and Jeff Katz titled "The Encyclopedia of Trading Strategies" Published by McGrawHill. The entire last part of the book details the experiments done to improve exits. In addition, the authors provide references to the software they used to do the testing.
Personally I use Excel and I test manually, but thats just me.
Good luck,
Lefty