Commands:
  bitflyer cancel_all                                          # cancel all of orders
  bitflyer counter_trade                                       # clear all positions
  bitflyer help [COMMAND]                                      # Describe available commands or one specific command
  bitflyer order_by_best -a=amount -t=buy/sell                 # create limit order by best price in the board
  bitflyer order_by_twap -a=amount -i=second -n=N -t=buy/sell  # trade specified amount N times at specified intervals (TWAP algorithm).
  bitflyer stop_by_range r, --range=price range                # create stop order by range based on current position
  bitflyer summary                                             # show current balance information