Test-Driven Python Development

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 1 if 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 ...