A rule change is a new market variable

A market rule changes and the chart keeps moving as if nothing happened. The data may look continuous, but the question has changed.

A new definition, source, or cutoff is a new variable in the analysis.

Mark when the change takes effect

Save the old wording, new wording, announcement time, and effective date. A notice date and a trading date may not be the same.

Keep positions opened under the earlier rule separate from opportunities evaluated under the later one.

Rebuild the affected assumptions

Check the outcome set, source priority, cutoff, payout, and settlement path again. A small wording edit can change which evidence counts.

Do not carry an old probability into the new contract without writing why it still applies.

Split the history

Label charts and notes before and after the change. This prevents a smooth-looking time series from hiding a break in the question.

The useful question is not whether the price history is continuous. It is whether the rules that gave the history meaning are still the same.

Further reading: Prices and order books · Resolution rules · Current fees.

Explore the markets: Open Polymarket (referral link).