So I didn't know where to put this, but figured those of you trading for a living might have shared this concern. This is probably paranoid, but imagine you come up with a very successful trading strategy and have consistently had GREAT returns for a number of years. Is there any reason to be concerned about your broker noticing your great returns and trying to copy your trading strategy and thus ruining it? Or, perhaps, if they can't figure the strategy out, and if they're one of the electronic brokers, they might just tell their system to make the same trades every time you place them except have their system put in their trades first. Is there cause for concern? I realize one might say there's nothing to be worried about because you'll never come up with a strategy so good that others would notice you above everyone else and want to copy, but hypothetically what if you did? Are there ways to protect your strategy?