These type of indicators are need not be cycle based at all. They may be considered to be volatility based, as they are attempting to determine when market momentum reverses. Often, they are based entirely on how price behaves, with no other onsiderations.
However, in reality, they may take other factors, such as the speed of the tape, into account. They are, correctly, indicators of support and resistance, though they can also be indicators of continuation of price moves.