RE:Accumulation Phase; Absorbing Stock Like a Sponge FP has a wonderful explanation of Wyckoffian manipulation tactics here: https://financialpost.com/investing/the-secret-trading-strategy-from-the-1930s-that-hedge-funders-dont-want-you-to-know-about
Like all manipulation strategies, however, it can be entirely overthrown by high impact news events. These are not fool-proof strategies, particularly once others become wise to them.