HOW DO I SCAN FOR Weekly PPO (Percent Price Oscilator) cross overs?

On the advanced scan workbench,

select PPO Line and Add it

You will get a default version added to the bottom of the criteria window.

select PPO signal and Add it

Remove the operators and right hand values and edit the two lines into one line.

Make each indicator weekly by putting the modifier "weekly" in front of each one.

Put the "x" operator between them.

If you want Line to cross above Signal, put Line first (Line x Signal). If you want Line to cross below Signal, put Signal first (Signal x Line)