Forget to share another piece of information on trend-following systematic trading system, which turtle method is one of them.
When i backtested a trend-following system using 10 over years of daily data. The return was very good.
If you were to examine the individual trades, you would find that there are periods of losing trades. These are periods where the losses could be 10 to 15 consecuively losses in a row! Of course, there were also successive consecutive wins.
After backtesting many different trend-followng systems, I came to the conclusion that consecutive losses cannot be avoided with a trend-following system. Huge drawdowns are part and parcel of a trend-following system (this is where money management comes in). Any attempt to circumvent such losses would result in the system not being able to capture the big-moves.