Implementing the dual crossover moving average
What we are going to do is to implement a method get_crossover_signal for the Stock class. The following are the requirements for the method:
The method takes a date as a parameter, and returns if there is any crossover on that date
The method should return
1if there is a Buy Signal (5-day moving average crosses 10-day moving average from below to above on that date)The method should return –1 if there is a Sell Signal (5-day moving average crosses 10-day moving average from above to below on that date)
If there is no crossover, then the method returns 0 (neutral signal)
The method should only take into account the closing price (the last update for the date), and not the opening or intermediate prices for the date
If there are no updates for the date, then the method should use the previous closing price
If there is not enough data to calculate the long-term moving average (we need closing prices for at least 11 days), then the method should return...
