Currently a user has to type the parameter (sometimes a lot) into customized indicators. Many times, the parameter is related to a date (suppose in EOD data), e.g. the volume of certain day, the close price of certain day.

If a user could just drag (left button down) the indicator to a position on the main chart, then release the left button and have the corresponding date (or data index, corresponding to the position in the chart) inputted into the formula, that will be very helpful.