用于计算期权价格,窝轮的价格却并非取决于市场供求，而是以「期权定价模式」计算窝轮的期权价值。期权订价模式是利用数学算式，因应不同的订价因素，如正股价格、引伸波幅等决定其价格-used to calculate options prices, Waterloo round of price is not determined by market supply and demand, but "option pricing model," Waterloo round of the calculation of the value of the options. Options pricing model is the use of mathematical formula, to cope with the different pricing factors, such as prices of the underlying stocks, implied volatility of its price decisions