Thank you for your reply.
I could fix my bag.
The cause of my bag was tradeid.
Thank you.
https://community.backtrader.com/topic/622/multiple-order-managment

Thank you for your replay.
I found the reason is I didn't use tradeid.
In my trade, there are buy,buy,sell,sell.
After I rewrite multitrade version by using tradeid, the bag fixed.
Thank you

I want to count multiple trades.
In my strategy, I buy() at time T and T+1, and I sell() at time T+20 and T+21.
In this case, I desire the amount of tredes by get_analysis is 2.
Otherwise, it return 0 and occuers keyError.
Can't get_analysis() count multiple positions(trades)?
plz help me.

Thank you for your advice. This is my strategy. The analysis does not work, it couldn't count the amount of trades.
I run get_analysis() and then,
winrate = analysis.won.total / analysis.total.closed
It occuers keyError.

def next(self): # 行ごとに呼び出される

    #print(self.position)
    if self.judge_order_buy():
        trade_amount= int(self.cash/20/self.dataclose)
        self.count+=1
        #if self.position: # ポジションを持っている場合
         #   self.close() #
        self.order=self.buy(size=trade_amount)
        self.sell_unwind.append([len(self),trade_amount,0])

    elif self.judge_order_sell():
        trade_amount = int(self.cash/ 20 / self.dataclose)
        self.order = self.sell(trade_amount)
        self.buy_unwind.append([len(self), trade_amount, 0])
    #if self.order.status in [self.order.Canceled, self.order.Margin, self.order.Rejected]:
        #self.broker.cancel(self.order)
    self.unwind_buy_operate()
    self.unwind_sell_operate()
    


    if Close_all_positions:
        # i = list(range(0, len(self.datas)))
        # for (d, j) in zip(self.datas, i):
        for j, d in enumerate(self.datas):
            if len(d) == d.buflen() - 1:
                close = self.close(d, exectype=bt.Order.Market)

class strategy_my(myStrategy):
unwind_days = 20 # 1M
count=0

def judge_order_buy(self):
    return self.signal == 1

def judge_order_sell(self):
    return False

def unwind_buy_operate(self, expected_rate=None, loss_cut_rate=None):
    for i, buy in enumerate(self.buy_unwind):
        if buy[0] + self.unwind_days == len(self) and buy[1] > 0:
            # Unwind at the last day
            self.buy(size=buy[1])
            self.buy_unwind[i][1] = 0

def unwind_sell_operate(self, expected_rate=None, loss_cut_rate=None):
    for i, sell in enumerate(self.sell_unwind):
        if sell[0] + self.unwind_days == len(self) and sell[1] > 0:
            # Unwind at the last day
            print(len(self))
            
            if self.position: # ポジションを持っている場合
            
              self.order=self.close(size=sell[1])
              self.sell_unwind[i][1] = 0

There are many trades in the log, but it occuers keyError.
analysis["total"]["total"] is 1.
How can I fix it?