When selecting a custom data filter it could make sense to allow for time based values to be entered so you can more accurately filter the data.
We are working on to provide time selection option in custom time period for reports. It will be available by end of next month.
You can now use the time selection option in the custom time period for reports. Please navigate to Home > Monitors and choose a monitor of your preference. Navigate to the Summary tab and then change the time period to Custom Period in the drop-down provided on the top right corner of the page. Choose the date and time of your preference from the field next to the drop-down and click Apply once done.
Please feel free to add your feedback as comments below.