Finding qualifiers in todays/tomorrows cards are found manually, ie scanning each race for potentials. Yes this is slow and laboured and like i said before i have missed a few winners as well as losers. Its not bomb proff either as odds can change quickly, which can bring horses outside the cut off as well as inside.
All that being said, i find the tools great for helping to locate potential profitable seams, like trainers preferred courses, or type of horse race its likely to win., and when they are most likely to strike form. Also using historical data helps me to track down similar types of horses for todays races.