The T-bonds/notes could have the price stays the same for a few minutes during the market hours. It seldom happens in the indices futures. Does it have any meaning?
ADX, You may be looking at TY, which is the 10yr bond open out-cry. Usually, it takes a while for the price to be reported. The TY is also traded on A/C/E, symbol is ZN, where you'll see a 'faster' price movements. The bonds' price is less volatile than the mini ES/NQ, and notice the volume. ZN volume usually dies down in the early afternoon. Cheers!!