What a strategy test reports at every step the strategy takes: the trader's current list, and the whole vocabulary, grouped by indicator (price, volume, RSI 14, EMA 20, EMA 60, VWAP, the Bollinger bands, the 20 bar range, bar size, the 50 bar mean, the clock). Each indicator has named fields (the bands have boll_up and boll_dn, the range has range_high, range_low and range_pos). An item may also be an expression over the fields, such as close - ema20 or rsi14 > 50. Call it before watch_set, and when the trader asks what can be tracked.