Purge: Overlapping Labels

A trade can stay open for at most H bars. What is the latest it can open on the training window and still be certain to close before the seam?

• Any time before the seam
• H bars before the seam
• L bars after the seam

A purge drops the trades that open in the last 100 bars of training. Do those 100 bars of prices still go into the β fit?

• Yes, the purge removes scored outcomes, not prices
• No, the whole zone is deleted from training
• Only if the pair passed every gate