Roscoe wrote:I believe that any entry must have a corresponding exit and that therefore the two actions or entities are inextricably linked.

Perhaps true. For a moment let's suppose so. Then if you have six generic entries (e.g. (1)MA cross, (2)Channel Breakout, (3)RSI extreme, (4)Bollinger Band Breakout, (5)Opening Range Breakout, (6)ADX pop) and six generic exits, you need to test 6 x 6 = 36 different combinations of an entry and a corresponding exit.

On the other hand, perhaps the other viewpoint is correct. Perhaps entries and exits are

*not* inextricably linked. Perhaps their goodness can be measured in isolation, and perhaps in practice they operate relatively independently. Now under this second scenario you only need to test 6 entries in isolation, plus 6 exits in isolation, = 12 total tests. A lot less work! The theory profs would call the former "Order N squared" and the latter "Order N".

This little arithmetical exercise doesn't

*prove* one viewpoint or the other. But it might justify wishing for one of the possibilities versus another.