Conditional Format based on cell value

Question

For example; want to turn a cell yellow if its value is less than another cell value.
Is this possible?
Conditional format rules don't seem to like cell references.

Answer 1

There are many ways to call attention to a value that needs to be emphasized because of its relationship to other values. What you decide to do will be influenced by how particular you are about the end result vs. the trouble that you will have to go through to achieve it. When other cells need to reference a cell that may be either text or numeric, you can use the TRIM function, or other text functions, to remove interfering characters. Here's an example, where you can see the last row multiplying the previous, manipulated row, by 2.
Also, all the cells are formatted as Currency, with to ill effect. In the example I left the cells with the conditional format in default alignment so you could see the added space character against the left margin of the cell.
I think the easiest way to call attention to a cell is to add an adjacent row of column with a conditional expression that 'lights-up' when there is an alarm condition.
Jerry