You had created the variable "context.long_leverage" and made it equal to 1. So when you record it, it will always plot the value of 1.
What you really want is the leverage in the account, "context.account.leverage". I made a few tweaks to the algo:
- fixed the leverage variable
- changed symbols() to sid() for robustness. (And the algo wasn't ordering GOOG because Google had a split in 2014 and changed their tickers)
- added a check for open orders before placing more orders.
You'll notice the account leverage is under 1, meaning that the portfolio is still sitting in cash. This is likely happening because the "price < sma" condition isn't true for each stock in the portfolio. If you're looking for other learning tools, take a look at the Quantopian API tutorial series.
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