RSI is buying at wrong value

[ylu]

Hello everyone, I am working on improve my TA skills to hit a career on Investment Banking so that i am interested on backtests by backtrader.
I have a problem about RSI indicator. I am writing many statements but it is still close.buy over RSI 70.
Here is my code related RSI.

    def __init__(self):
        self.EMAh = bt.talib.EMA(self.data.close, timeperiod = 8)
        self.EMAo = bt.talib.EMA(self.data.close, timeperiod = 18)
        self.EMAy = bt.talib.EMA(self.data.close, timeperiod = 27)

        self.crossoverhy = self.EMAh - self.EMAy               
        self.crossoveroy = self.EMAo - self.EMAy               
        self.crossoverho = self.EMAh - self.EMAo
        self.x = self.EMAy - self.data.close[0]
        self.y = self.EMAo - self.data.close[0]
        self.z = self.EMAh - self.data.close[0]
        # Control marketh trend  
        self.sma = bt.indicators.SMA(self.data.close, period=self.p.smaperiod)
        self.smadir = self.sma - self.sma(-self.p.dirperiod)
        self.rsi = bt.talib.RSI(self.data.close, period=36)
        self.trendline = self.data.close[0] - self.sma

and,

    def next(self):
        if self.order:
            return 
        if not self.position:
            if self.trendline > 0:
                    if self.rsi < 45:
                        self.order = self.buy()

        if self.position:
            if self.trendline > 0:
                if self.rsi > 70:
                    self.close()

Here is plot:

What is wrong with my code, what it is not selling at this point and if I keep adding 3EMA method it is buying when RSI 80.
Why this is happening ?
Thank you for your time.

[ylu]

Check this out;

and this one;

[ylu]

Now it did not close position.. what is wrong ??

    def next(self):
        if self.order:
            return  # pending order execution
        if not self.position:
            if self.trendline > 0:
                if self.rsi < 45:
                    self.order = self.buy()

        if self.position:
                if self.rsi >= 65:
                    self.close()
                if self.data.close[0] <= self.sma:
                    self.close()

Is that happening to only me ??