Calls may only be logged before the session opens; once written they are immutable, so the record can't be revised.
A prediction for a trading session is accepted only before that session opens (09:30 ET). After the open, the prediction job refuses to log calls for the day — an agent cannot peek at the morning tape and then 'predict' it.
Stored calls are insert-only and immutable: once a call is written it is final, never overwritten and never deleted. Together the lock and the immutability are what make the graded track record trustworthy.
Related: Open-to-close grading · Directional precision
Full grading rules: methodology.
Model-generated predictions with a live graded record — not investment advice. 模型生成的预测，非投资建议。