I'm looking for someone who can help me build a custom scan in ThinkorSwim.

Here is what I'm looking for:

On a weekly timeframe:

Two consecutive green up bars, where the close of bar two is greater than the close of bar one. Then the third bar is a red down bar where the close of bar 3 is less than the low of bar 2.

Is this possible to build in the TOS scan parameters?

Thank you,
Mark

def upbar = close > open;
plot scan = upbar[2] and upbar[1] and close < low[1];