- A product is listed at $50.
- Ten days later, it goes to $40 - and the customer knows it will go there in that time frame.
- Ten days after that - again public knowledge - it goes to $25, and that's the bottom.
By contrast, if it is a limited time discount, it could be configured to cause the price in increase automatically after so-many days, or after "x%" have been sold.
The the extension options would need at least:
- Set how many price changes
- Set the prices or % change
- Set the interval times (or maybe the stock sold or remaining, as in the second example)
- Set whether the time is visible until the next change
- Set whether the future price will be visible