Exception in candle_value() method

[lploumen]

There's a problem when trying to build the array in the candle_value() method.

In https://github.com/joeldg/bowhead/blob/master/app/Traits/CandleMap.php#L211 The hanginman candle is in the counter_purpose['bear'] array. The code mentioned above will try to get the hanginman key in the price_continuation['bull'] array which will lead to an exception.