One way to incorporate multiple stocks into your algorithm is to declare the code below in your initialize method
context.stocks = [#your multiple sids here]
and in your handle_data method, you would iterate through each of these stocks like so
for stocks in context.stocks:
# Your main methods below
One other thing to note is that your buy_order and close_buy_order methods must also be changed to take in the current stock as a parameter as in
def buy_order(context, stock):
I've attached a backtest to show what kind of changes you'd need to have.
Hope this helps!
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