It is nice to have a backup solution for SIP screening but robbie's GTR1 is an order
of magnitude better for both screening and backtesting. First of all SIP doesn't
provide any backtesting. On the AAII site they supposedly have backtest results for
their standard screens but they aren't real world backtests, their results assume you
bought all stocks that pass the screen every month with no slippage. No final sort to
limit your portfolio to a manageable size. I believe their numbers are based on
trading on the Friday close before the give you the data on Saturday. GTR1 trades with
either a 1 day lag or any number you choose to test with. GTR1 does a rolling daily
start test (for a 20 day hold it reports the results for 20 sequential 20 day holds).
A significantly better more robust test of the strategy. Robbie has integrated daily
non survivorship daily data into his backtester which makes it that more valuable.

For example, I just ran the same 3ptRelitiveValue on my monthly backtester from 8/29/1997.
Top 5 tilldrop 5 period 28 days slipRndTrp 0.70% , Dividends True , CashForNoPicks True
CAGR Fri 20.0% Mon 17.6% GSD 34.0% CAGR/GSD 0.6 UlcrIndx 16.9% MxDD 48.1%
AT 945% 1143 Buys, 1578 Holds and 96.0% Avg Invested
326 cycles, Over 25.59 Years Missing at Sell 17

GTR1's more complete results show daily start results varied from 15.9% to 32.7%.
My 20% single start date was just by luck near the midpoint. My GSD @ 33% at least gave
me an indication that actual results could be much higher or lower.
Max Drawdown and Ulcer Indexes were similar to GTR1's.

RAM / FLARAM