code: def initialize(context):
      context.ASSET_NAME = "btc_usdt"
      context.TARGET_HODL_RATIO = 0.8
      context.RESERVE_RATIO = 1.0 - context.TARGET_HODL_RATIO
  
      context.is_buying = True
      context.asset = symbol(context.ASSET_NAME)
  
      context.i = 0
  
imports: import pandas
  import matplotlib.pyplot
  from catalyst import run_algorithm
  from catalyst.api import order_target_value, symbol, record, cancel_order, get_open_orders
label_desc: Use image node_id 1 for calling a global function with example usage: initialize(context) without return types