Runaway spend

Emails you when today's spend on an account breaks far through its own normal ceiling - the classic sign of a misconfiguration, a tracking-template error uncapping spend, or someone spending your money after a takeover. The ceiling is computed from each account's own recent daily spend using robust statistics (median + MAD), so it adapts automatically across your whole book and one freak historical day can't distort what "normal" means.

Defaults & settings

• MAD multiplier (k) - how far above the median (in median absolute deviations) the ceiling sits. Default 4; higher = less sensitive.

• Minimum daily spend - don't alert below this amount; avoids noise on tiny accounts where a few extra dollars is meaningless. Default $50, adjustable $10-$1,000.

• Checks every 30 minutes; 12-hour cooldown.

Example. An account that averages $80/day is at $290 by 2pm. That's well through its ceiling and above the $50 floor, so you're emailed mid-afternoon - not at the end of the month when the invoice lands.

Good to know. Because the ceiling is median-and-MAD based, a naturally spiky account (e.g. one that always surges on Mondays) doesn't cry wolf - outlier days are already priced into its normal.