How to detect equivalence points? [duplicate]

How do we detect equivalence point from a titration of an acid with a basic titrant from thу titration curve ($$\mathrm{pH}$$ vs. Volume of titrant added)?

Can we predict an equivalence point just by seeing the shape? Some people say that

when $$\frac{\mathrm{d(pH)}}{\mathrm{d}V} = 0,$$ equivalence point has been reached.

Is it correct? I doubt if it is correct. It is also written that there is a distinct "break" in the curve at equivalence point. What is this break?