- In your algorithm, click the box with the start date. The little calendar popup should come up. At the very bottom of the calendar it says "Automatic date management is off. Turn on"
- The scope is per-algorithm.
The feature, as a whole, is not bullet-proof. The more complex your algorithm is, the harder it is for the code to automatically determine what is being traded. That automatic date management is mostly aimed at helping beginning users avoid unpleasant, difficult roadblocks. They're almost like training wheels. As you get more experienced as an algo writer you learn to protect yourself from "bad" data, and the training wheels become less important.
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