In about 4'200 trading days, 17 calendar years,
the system has performed with a combined
long and short strategy a total of 172% or
10% per year, on the SPY ETF.
Long position over the time frame yielded 123%, 7.2% per year.
Short positions over the time frame yielded 48%, 2.8% per year.
The performance was obtained without curve fitting. All parameters were kept the same values.
In the same time, the SPY ETF raised from 44 points to 111 points, a gain of 67 points, or 152% net gain, dividend payments excluded.
The long trading occupied 1'420 trading days of total 4'200 available trading days.
The short trading occupied 1'890 trading days of a total 4'200 available trading days.
Cumulated the system was in long and short position 3'310 trading days, of a total 4'200 available trading days, or 78% of the time whole available time.