To view Moody's bond ratings on a chart, you must first add the requisite market data package. Log in to Client Portal and go to User menu (head and shoulders icon in the top right corner) followed by Settings. Then under the User Settings section find Trading Platforms and select Market Data Subscriptions. Click the Configure (gear) icon next to Subscriptions to modify the subscriptions. Then select the region "North America" followed by "Fixed Income" and check next to the "Bond Ratings (Corporate and Municipal)" market data subscription. Select the Continue button to review and confirm your request.
Once you have the proper market data you must add the Quote Panel to your chart. Click the View menu option within the chart and select Quote Panel. The Quote Panel will now populate at the bottom of your chart. Click the small wrench icon at the far right of the Quote Panel and the Configuration window will populate. Under Available Columns on the right side you will see the "Bonds" section. Open this section and find the Ratings option. Left click it to highlight the column, click the Add button in the middle, then click Apply to save your changes and OK to close the window. You will now see the Ratings column in your Quote Panel.