My experience with the ComboGrid is that unfortunatly it does not work in all brokers MT4 platforms. Maybe something is off in the coding?
In some Mt4 platforms it is dwarfed and out of wack.
For me it worked in the forex.com demo MT4, but not in the live MT4. But it works in my aaafx live Mt4 (be sure to view it on the 1 hour chart).
Sometimes the lanes get all messed up and turn dark blue or even green - but then it turns normal as the price moves.
This same indicator is known as "FXGauge" at another forum, but does not have the alert.