function [net_value, return_value, turnoverNum] = SingleTimeStandard(asset, assetFull, signal, weight2, weight3, tc)
    %3. standard 二+三类，不同权重测试
    %第三类卖点 13
    %第二类卖点 12
    %第三类买点 3
    %第二类买点 2

    backtest = transpose(signal);
    backtest(:, 2) = 1 : length(signal); %保留原始位置

    %标记买卖点
    %for loop 中只需要知道当前买卖点类型，下一个买卖点类型只是用来确认区间
    backtest(backtest(:, 1) == 13 | backtest(:, 1) == 12, 3) = -1; %标记买卖
    backtest(backtest(:, 1) == 3 | backtest(:, 1) == 2, 3) = 1;
    backtest(backtest(:, 1) == 0, :) = []; 

    %记录原始数据时间
    %计算净值时按照原始时间
    FullTime = datenum(assetFull.Date);
    backtest(:, 2) = asset(backtest(:, 2), 1); %将信号位置换成时间
    backtest(:, 2) = find(ismember(FullTime, backtest(:, 2))); %找到信号时间在原始数据中的位置



    %计算仓位变动位置
    change_value = [true; diff(backtest(:, 1)) ~= 0; true];
    change_value(1) = [];
    num_rep = diff(find(change_value)); 

    %设定初始仓位
    if backtest(1, 1) == 2
        backtest(1, 4) = weight2; 
    elseif backtest(1, 1) == 3
        backtest(1, 4) = weight3;
    elseif backtest(1, 1) == 12 || backtest(1, 1) == 13
        backtest(1, 4) = 0; 
    end
    
    %backtest 
    %column 1 signal
    %column 2 original signal position
    %column 3 long short signal 1 -1
    %column 4 position percentage

    YOLO = 0;

    for i = 2:size(backtest, 1)
        if backtest(i, 3) == 1 %买入
            if backtest(i, 1) == 2 
                backtest(i, 4) = backtest(i - 1, 4) + weight2; %加仓 weight2 成仓位
            else
                backtest(i, 4) = backtest(i - 1, 4) + weight3;
            end

        else %卖出
            if backtest(i, 1) == 12
                backtest(i, 4) = backtest(i - 1, 4) - weight2; %减仓 weight2 成仓位
            else
                backtest(i, 4) = backtest(i - 1, 4) - weight3;
            end
        end

        

        if backtest(i, 4) > 1 + YOLO 
            backtest(i, 4) = 1 + YOLO;

        elseif backtest(i, 4) < 0 - YOLO 
            backtest(i, 4) = 0 - YOLO;
        end
    end


    return_value = [];
    return_value(1) = 1;

    %调仓收益单独计算，替换
    %二类三类不同权重

    change_value = [true; diff(backtest(:, 4)) ~= 0; true];
    change_value(end) = []; %从第i-1个位置到第i个位置是否有变动
    adjustPos = backtest(change_value == 1, 2); %调仓位置

    if backtest(1, 2) ~= 1 %如果不是第一天调仓的话
        return_value(2: backtest(1, 2)) = 1; %设定初始仓位为0
    end
    

    for i = 1:size(backtest, 1) - 1
        if backtest(i, 3) == 1 && backtest(i + 1, 3) == -1
            for j = backtest(i, 2) + 1 : backtest(i + 1, 2)
                if j == backtest(i, 2) + 1 || j == backtest(i + 1, 2) %调仓当日按照均价计算
                    return_value(j) = (assetFull.Average(j) ./ assetFull.Close(j - 1) - 1) * backtest(i, 4) + 1; 
                else
                    return_value(j) = (assetFull.Close(j) ./ assetFull.Close(j - 1) - 1) * backtest(i, 4) + 1;
                end
            end
        elseif backtest(i, 3) == -1 && backtest(i + 1, 3) == 1
            for j = backtest(i, 2) + 1 : backtest(i + 1, 2)
                if j == backtest(i, 2) + 1 || j == backtest(i + 1, 2) %调仓当日按照均价计算
                    return_value(j) = (assetFull.Average(j) ./ assetFull.Close(j - 1) - 1) * backtest(i, 4) + 1; 
                else
                    return_value(j) = (assetFull.Close(j) ./ assetFull.Close(j - 1) - 1) * backtest(i, 4) + 1;
                end
            end
        elseif backtest(i, 3) == 1 && backtest(i + 1, 3) == 1
            for j = backtest(i, 2) + 1 : backtest(i + 1, 2)
                if j == backtest(i, 2) + 1 || j == backtest(i + 1, 2) %调仓当日按照均价计算
                    return_value(j) = (assetFull.Average(j) ./ assetFull.Close(j - 1) - 1) * backtest(i, 4) + 1; 
                else
                    return_value(j) = (assetFull.Close(j) ./ assetFull.Close(j - 1) - 1) * backtest(i, 4) + 1;
                end
            end
        else
            for j = backtest(i, 2) + 1 : backtest(i + 1, 2)
                if j == backtest(i, 2) + 1 || j == backtest(i + 1, 2) %调仓当日按照均价计算
                    return_value(j) = (assetFull.Average(j) ./ assetFull.Close(j - 1) - 1) * backtest(i, 4) + 1; 
                else
                    return_value(j) = (assetFull.Close(j) ./ assetFull.Close(j - 1) - 1) * backtest(i, 4) + 1;
                end
            end
        end
    end



    subTail = length(return_value) + 1;
    if backtest(end, 2) ~= size(assetFull, 1) %如果最后一天不调仓的话
        for j = subTail : size(assetFull, 1)        
            return_value(j) = (assetFull.Close(j) ./ assetFull.Close(j - 1) - 1) * backtest(end, 4) + 1;
        end
    end
    
    net_value = [];
    net_value(1) = 1;


    for i = 2:length(return_value)
        if any(adjustPos == i) %如果调仓
            net_value(i) = net_value(i - 1) * return_value(i) * (1 - tc);
        else
            net_value(i) = net_value(i - 1) * return_value(i);
        end
    end
    
    turnoverNum = length(adjustPos); %调仓频率

end