code: def initialize(context):
      context.i = 0
      context.asset = symbol("ltc_usd")
      context.base_price = None
  
file_path: catalyst/catalyst/examples/dual_moving_average.py
imports: import matplotlib.pyplot
  import numpy
  import pandas
  from logbook import Logger
  from catalyst import run_algorithm
  from catalyst.api import record, symbol, order_target_percent
  from catalyst.exchange.utils.stats_utils import extract_transactions
label_desc: Use image node_id 1 for calling a global function with example usage: initialize(context) without return types