I have attached the Custom Blocks below as an example with Momentum Indicator, but this happens on many other Oscillators, like:
Bulls Power, Bears Power, CCI, DeMarker, DIDI, Disparity Index, DPO, DSS Bressert, Entropy Math, DVO, Laguerre, Momentum, MFI, ROC, RSI, STC, Stochastic, Ulcer, ZScore, etc...
Status changed from New to Refused
Attachment image-0.png added
See the screenshot - you probably don't have opposite blocks configured correctly.
Momentum crosses above Lvl is negated to Momentum crosses below IL - but they are quite different blocks, first one has parameters period (int) and level (double), and second one has two periods.
This is why you see default value there - because the second period in the other block doesn't know what to negate from (first block doesn't have second period), so it has default value.
I changed the opposite blocks above Lvl <-> below Lvl, above IH <-> below IL and it works correctly.