Hi i am a new coder so please help me if you can.

import numpy as np

### <summary>
### Basic template algorithm simply initializes the date range and cash. This is a skeleton
### framework you can use for designing an algorithm.
### </summary>
class BasicTemplateAlgorithm(QCAlgorithm):
    '''Basic template algorithm simply initializes the date range and cash'''

    def Initialize(self):
        self.SetStartDate(2017,1, 1)  #Set Start Date
        self.SetEndDate(2017,12,31)    #Set End Date
        self.SetCash(5000)           #Set Strategy Cash
        self.AddForex("EURGBP", Resolution.Hour, Market.Oanda)
        self.rsi = self.RSI("EURGBP", 14)

    def OnData(self, data):
        if not self.rsi.IsReady: 
        if self.rsi.Current.Value < 30 and self.Portfolio["EURGBP"].Invested <= 0:
            self.Debug("RSI is less then 30")
            self.MarketOrder("EURGBP", 25000)
            self.Debug("Market order was placed")
        if self.rsi.Current.Value > 70:
            self.Debug("RSI is greater then 70")
    def OnEndOfDay(self):
        self.Plot("Indicators","RSI", self.rsi.Current.Value)

Basically i want to replace the exit from RSI is greater then 70") to a volexpclose Atr indicator.

input numATRs = 1.5;
input length = 5;
input averageType = AverageType.SIMPLE;

def val = MovingAverage(averageType, TrueRange(high, close, low), length);

def condition = low[-1] <= close - val * numATRs;

thanks in advance!