The logic:


1. If you can’t tell a machine how to perform your strategy, then you simply don’t have a strategy. Strategy = clear rules. No clear rules = no strategy.2. If you do have a strategy, but insist on performing it yourself, your emotions will inevitably get in the way, sooner or later. Automation is the best way to prevent it.3. Most strategies can’t be reliably back-tested manually. No reliable back-testing = loss.

"Markets are constantly in a state of uncertainty and flux and money is made by discounting the obvious and betting on the unexpected" - George Soros