Tick Volume indicator doesn't work properly

I noticed that unlike the RSI or MACD indicators, “Tick Volume” doesn’t progress. It stays flat until I hit F5 button, then it reloads and continues flat from that moment on until repeated… (It also reloads if I change time period in the chart.)
A bug?

Looks like a bug that they’re ignoring. Plenty of threads about it.

Seems so…
Same goes for ATR (on CFD).