I trade only "automatic trading" with computerized strategies.
After many years in this field I realized that in order to create a good system, you need to fully backtest it with historical data.
The best way to do it, is to write the system code in EL (I use Tradestation) and to see if it was a winner in previous years. If it didn't succseed in previous years (on history data) there is no chance it will start winning in the future...
My personal conclusion to those of you who are looking for a new system - You must backtest your system!!! from my personal experience I can tell that unfortunately, many systems you find in forums or in books are loosers!!
And actually, once you wrote the system's code and backtested it, and it's a working one, there is no reason to sit all day glued to the monitor... the computer can do it, with no mistakes...
