15-minute market

A Kalshi crypto contract that resolves every fifteen minutes based on whether a coin closes the window above or below its opening price. It pays yes for up and no for down.

Because each window is short and starts at the current price, fresh 15-minute markets open near 50 cents and are close to independent from one window to the next. That independence is why chasing streaks in them tends to lose: a run of ups does not raise the odds of another.