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If your strategy already runs on Zipline or was originally written for Quantopian, you’re migrating to the platform Ziplime’s own engine descends from. This is the most direct migration path available. Existing Zipline-style strategy code can usually be brought in with minimal changes — the main adjustments come from Ziplime’s additions on top of stock Zipline: async execution, the unified backtest/live logic, and access to fundamental and alternative data. See Engine Overview for what’s been added.
Quantopian itself has been shut down for some time; if you’re migrating old Quantopian research, expect to update deprecated API calls as part of the move.