title: Excel : Alternatively Change Cell Color as Cell Value Changes
body: <p>I have developed an Excel Real-Time Data Feed (RTD) to monitor Stock Prices as they arrive.<br>
  I Would like to find a way to change the color of a cell as prices change.<br><br>
  For example, a cell initially Green would turn to Red when the value changes (new price occurred on it via RTD Formula it contains) and then change back to Green when a new price arrives, and so on...</p>