Here is an even more explicit list of instructions:
-Focus your volume chart, press F6, add the
Spreadsheet Study study from the left window to the right window.
On the Settings and Inputs tab:
-Set the Chart Region to 2.
-Press the
Scale button and set the Scale Range to User Defined, the Top of
Range = to the same value as your volume per bar setting (F5 >> Bar Period >> Volume per Bar), and the Bottom of Range = 0.
-Give it a name in the Spreadsheet Name field, e.g. Volume-o-meter.
-Set the Input Name >> Number of Rows to 10. No need to change any other Input Values.
On the Subgraphs tab:
-Set the Draw Style of K (SG1) to Bar
-Set the Color and Width to your choice.
-Press OK and OK.
When the spreadsheet appears, put this in cell K3:
=IF(ROW()=3,F3,0)
FYI re: spreadsheet studies:
-By default, the sheet#/tab position directly correlates to the chart number, so enter the formula on the sheet # that matches the chart #. Ignore the other sheets, if any.
-You can minimize the spreadsheet; it does not need to be visible.