coding study for thinkorswim platform

Hi, I have been using study pattern from thinkorswim platform, its called ZIGZAGSTEPPATTERN, and I wish to get a way to add it to the scanner(TOS scanner) or to a watchlist reflecting when the arrow has made the move within a certain number of bars so we can still buy that stock before its too late. The pattern is quite simple is just an arrow, however, I tried adding it to my scanner on TOS but it's not show any result. I would like to see if you can add something to the code that it will work on the scanner or if you have any other solution. thank you David