将第三维数值用颜色表示在二维坐标轴中，红色表示正数，颜色越深数值越大，绿色表示负数，颜色越深表示数值负得越大。该图可以用于程序化交易策略回测时两个参数的优化。-Use 3 d numerical color said in two-dimensional axis, red said a positive number, the deeper the color value, the greater the negative, green said the larger the value minus the deeper the color said. This diagram can be used for programming trading strategy back to test two parameters optimization.