主题：[原创]期货成本价计算

//做多,固定手续费

costprice*multiplier*lots-enterprice*multiplier*lots = 2*commission*lots;

(costprice-enterprice)*multiplier = 2*commission;

costprice-enterprice = 2*commission/multiplier;

costprice = enterprice+2*commission/multiplier;

costprice = trimprice(enterprice+2*commission/multiplier)+mindiff;

//做空,固定手续费

enterprice*multiplier*lots - costprice*multiplier*lots = 2*commission*lots;

(enterprice-costprice)*multiplier = 2*commission;

enterprice-costprice = 2*commission/multiplier;

costprice = enterprice-2*commission;

costprice = trimprice(enterprice-2*commission/multiplier)-mindiff;

//做多,百分比手续费

costprice*multiplier*lots - enterprice*multiplier*lots = enterprice*multiplier*lots*commission + costprice*multiplier*lots*commission;

costprice-enterprice = enterprice*commission + costprice*commission;

costprice-costprice*commission = enterprice+enterprice*commission;

costprice*(1-commission) = enterprice*(1+commission);

costprice = enterprice*(1+commission)/(1-commission);

costprice = trimprice(enterprice*(1+commission)/(1-commission))+mindiff;

//做空,百分比手续费

enterprice*multiplier*lots - costprice*multiplier*lots = enterprice*multiplier*lots*commission + costprice*multiplier*lots*commission;

enterprice-costprice = enterprice*commission + costprice*commission;

costprice+costprice*commission = enterprice-enterprice*commission;

costprice*(1+commission) = enterprice*(1-commission);

costprice = enterprice*(1-commission)/(1+commission);

costprice = trimprice(enterprice*(1+commission)/(1-commission))-mindiff;