It depends on how you are monitoring market information. Context is a key differentiator.
The easiest to see is the shift in volume demanding liquidity occurring within the shadow of the previous trend. PB’s are within the shadow, reversals starts there and then are categorized depending on timescale of perception. All reversals show themselves on the fastest timescale first as the Dominance of sentiment shifts from oscillating to an offset then back to oscillating but now in a new direction.
Search for the 5x5 grid drill which breaks it down to perceiving the above as ‘legs’ on a bar.
Lots of terms I have never heard of before. Though I have heard of volume: I don't ever consult volume figures but people who do say its just as open to interpretation as price action. Hard to see this as an objective criterion for pull-backs v's reversals. Circumstantial maybe.....
As for something being in "the shadow of the previous trend", I don't know what that is but again it seems hard to say this is an objective measure if it doesn't have an objective definition itself. You'll have to say more to be convincing on this.
Maybe you have some examples please?