It can be illustrated with a very simple example - load 40 days of 5 minute data in data1 and 40 days of daily data in data2. Then try to plot the default ( 9 period) moving average on data1. It will not plot; at least not on my configuration. Rather MC shows "calculating" in the status line even though a look at processor usage indicates that no calculations are actually occuring.
Next change data2 to, for example, 60 minute bars or some other intraday period. The moving average study on data1 magically appears! Change data2 back to daily data and the study on data1 disappears again!
I used Esignal data feed for these tests fwiw, but I suspect the same problem may be present with other feeds.
This example is merely representative, I had this problem with most studies I tested and most of the time periods of daily and intraday data I tried to combine.
Hopefully you can fix this easily and quickly
