Go to the Charts tab in TOS.

Choose the aggregation period drop-down above the chart.

Choose Customize list.

Alternatively, you can choose Time frame setup from the Style drop-down.

Add a new custom time frame.

For an intraday time frame, click on Intraday. For daily and higher, click on Daily.

Choose how much data will load for that time frame from the Time interval drop-down.

Choose the time frame for your chart from Aggregation period.

Click Add.

Your new time frame will appear on the left.

Click OK to close the window.

You can now select your new time frame from the Time frame setup drop-down above the chart.