This GUI accepts the various constants needed to run a Black-Scholes calculation for pricing several European options Put, Call, Straddle, Strangle, Bull Spread, Bear Spread, Butterfly-This GUI accepts the various constants needed to run a Black-Scho

预测牛市和熊市的拐点。根据行业轮动的原理，及牛市的顶点为所有行业指数的均线系列都呈现多头排列，熊市的低点所有的行业指数的均线系列都呈现空头排列。-Bull/Bear market change point