To display two contracts in one chart, open a chart for the first contract.
Under Insert, select Add Contract to display on the Add New Contract window.
Enter the contract symbol or select a new contract from the drop-down menu.
Click on the radio button to display the contract in the open chart.
Click on the Left Axis radio button to display the column on the left side and click Ok. Compare the two Figures below.
Note: This is a Candlestick Chart Style.