code: def next(self):
      if self.buysell_sig > 0:
          self.log("BUY CREATE, %.2f" % self.data.close[0])
          self.buy(
              size=self.p.stake
          )  # keep order ref to avoid 2nd orders
  
      elif self.position and self.buysell_sig < 0:
          self.log("SELL CREATE, %.2f" % self.data.close[0])
          self.sell(size=self.p.stake)
  
file_path: backtrader/samples/commission-schemes/commission-schemes.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import datetime
  import backtrader
  import backtrader.feeds
  import backtrader.indicators
label_desc: Use image node_id 5 for calling the SMACrossOver obj's underlying member method code with example usage: obj.next() without return types