Trial and error method has become an applied science, which is manifested in the form of continuous trial and evaluation. Trial-and-error trading is also the pursuit of exploring a systematic method with black-box nature through continuous trial-and-error elimination.

When applied to the futures market, the forward, anticipation and uncertainty of futures prices lead to strong volatility and randomness, and high leverage further magnifies the uncertainty, so the prediction of futures prices is similar to the black box nature. The core idea of trial and error method is introduced into futures trading, and the spread opening method derived from it, combined with the fund management method derived from data analysis, develops the whole theoretical system framework of trial and error trading at present.