code: def update_trade(
          self,
          trade_id,
          stop_loss=None,
          take_profit=None,
          trailing_stop=None
      ):
          
          url = "{0}/{1}/accounts/{2}/trades/{3}".format(
              self.domain,
              self.API_VERSION,
              self.account_id,
              trade_id
          )
          params = {
              "stopLoss": stop_loss,
              "takeProfit": take_profit,
              "trailingStop": trailing_stop
          }
          try:
              return self._Client__call(uri=url, params=params, method="patch")
          except RequestException:
              return False
          except AssertionError:
              return False
          raise NotImplementedError()
docs: Modify an existing trade.
  
              Note: Only the specified parameters will be modified. All
              other parameters will remain unchanged. To remove an
              optional parameter, set its value to 0.
  
              Parameters
              ----------
              trade_id : int
                  The id of the trade to modify.
              stop_loss : number
                  Stop Loss value.
              take_profit : number
                  Take Profit value.
              trailing_stop : number
                  Trailing Stop distance in pips, up to one decimal place
  
              See more:
              http://developer.oanda.com/rest-live/trades/#modifyExistingTrade