* 'plan drop'
  * __depth ready__ (from market_monitor.js)
    * -> plan generation
    * -> buy orders placed
  *  **Wait for fulfillment** 
    * abort with 'exg order drop' (exg = btce/cryptsy)
  * 'balance' - update internal balances
  * 'ready'
    * -> transfer initiated
  * **Wait for transfer**
  * 'balance'
  * 'ready'
    * -> sell orders placed
  * **Wait for fulfillment**