Apparently, in NT7 # of bars to look back can be set from 2 different places in MA: (i) Properties > General > #bars to look back (ii) Columns > general > #bars to look back. If the two are set to a different value, the smaller value takes precedence (no matter which one of the two). It'd make sense to leave only one place for this parameter modification.

Overall I must say that NT7 is a great improvement over NT6.5, the application is much lighter and more pleasant to work with. Keep up the good work!

NOTE: I should correct myself - it's nice to have different lookback periods for different indicators, but the one in (i) should be abolished to avoid confusion