Anchor is the furthest point of a block.
Sell AUDUSD 500 << Anchor
Sell NZDJPY 450
Sell GBPCHF 400
Sell EURUSD 350
Sell EURCHF 300
Sell CHFJPY 250
Sell USDJPY 200
Buy USDCHF -200
Buy EURGBP -250
Buy NZDUSD -300
Buy GBPUSD -350
Buy EURJPY -400
Buy AUDJPY -450
Buy GBPJPY -500 << Anchor
Anchor can be any pair. It depends on market condition.
At this point of time when I am writing this, EURUSD (positive) and EURJPY (negative) is my setup anchor.
Some uses anchor is an indication of market direction as well. When an anchor pair dislocated even by the pair in the same group, this shows sign of reversal. At different market condition, the indicative of reversal can be different which adds to the difficulty for interpreting the T101 system.