Conditional Formatting - Traffic Lights issue

[sachins19]

Hello,

I have a conditional formatting rule to display 3 Traffic Lights when the criteria is either R, A, G. In Sheet 1, A1:A4 is the criteria range and B1:B4 is where is traffic lights appear.

Now the issue is if i copy the formula beyond B4 to B5 and if the corresponding cell A5 does not have any value the traffic lights for the entire B column goes away. Is it possible to keep the cell in B column blank (while formula applied) if no value is present in A and also ensuring the traffic lights for B column does not get distorted?

I have used MATCH formula in column B which is as follows =MATCH($A1,{"G","A","R"},0)-2

Attaching the document (Sheet 1 & Sheet 2) for reference. Please help.

Regards,
SachinTraffic Lights.xlsx