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When the Ask price goes below $15, he goes to the 'By Day' page and clicks on the Thursday tab, and clicks the Ask price to buy the order, and confirms it (shown above).
Analysis
Design #3
Pros
- Learnability: The UI is self-explanatory and easily learnable. Labels/links are concise, and the UI does not use terms that the typical user would fine unfamiliar. The interface is consistent across pages, and pages are organized into tabs intuitively.
- Visiblity: The UI shows data that is either public, or private and relevant to the currently-logged-in user.