At any rate every so often I re-test my filters against the most recent period and compare them to the previous period tested. This is done to ensure that I’m using the most efficient filters in my toolbox for the current market conditions. Here are the results of that re-testing for the stable of BOB’s we have managed to collect. As you will see and what I often find is that last month's darling is this month's dog.
From a reward/risk standpoint BOB v32x with 1.89 is far and away the best filter for use in the current time period. Here is that code.
show stocks where close is between 15 and 35
and average volume(90) > 500000
and close 2 days ago < ema(8) 2 days ago
and close 1 day ago < open 1 day ago
and close 1 day ago is less than 1% < open 1 day ago
and close 2 days ago is less than .5% < open 2 days ago
and low 1 day ago < low 2 days ago
and volume 1 day ago is more than 20% > volume 2 days ago
and close > open
and low > low 1 day ago
and close 2 days ago < ema(8)
and close 2 days ago < open 2 days ago
You should also note in your trading notebook that a change of date can cause filter results to vary significantly - the important thing to take away from that is if you are using some ready-made screen provided by one or another of the various sites - are you sure it is still working?
You see as much as we want to believe that CANSLIM or the "way of the turtle" or even that "Thursday's have the highest percentage of gap fills" are the solutions to all of our problems because learned books have been written about them - the fact is - nothing works all the time.
As the Gipper said - Trust - but verify.