'Initialises the SuggestedOrder. The quantity defaults
to zero as the PortfolioHandler creates these objects
prior to any position sizing.
The PositionSizer object will "fill in" the correct
value prior to sending the SuggestedOrder to the
RiskManager.
Parameters:
ticker - The ticker symbol, e.g. \'GOOG\'.
action - \'BOT\' (for long) or \'SLD\' (for short)
or \'EXIT\' (for liquidation).
quantity - The quantity of shares to transact.'

def __init__(self, ticker, action, quantity=0):

    self.ticker = ticker
    self.action = action
    self.quantity = quantity
