Coding for thinkorswim scan

I need a formula to load into the TOS scan that does the following It examines the weekly and daily "macd Two Lines 12/26/9 exponential" and gives the results for the following: When the daily green line changes direction (up or down) and the weekly green line in in the same direction as the new direction. For example the daily changes from up to down at the end of the day, let's say Tuesday, and the weekly is pointing down at the end of the day Tuesday, even though it has not completed the weekly price bar.