{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "$id": "https://firmtape.com/contracts/public/events/alerts/interest_move.schema.json",
 "title": "interest_move",
 "description": "Sent when a rank (C1 to C4, P1 to P4) moves to a strike already drawn today.",
 "allOf": [
  {
   "$ref": "envelope.schema.json"
  }
 ],
 "properties": {
  "type": {
   "const": "interest_move",
   "description": "`interest_move`."
  },
  "direction": {
   "enum": [
    "up",
    "down"
   ],
   "description": "Which way the rank moved."
  }
 },
 "x-when": [
  "The levels are the chart's, worked out from each five-minute frame, so they change at most every five minutes.",
  "A strike the rank left that is no longer drawn is said in the same message, not as an `interest_drop`."
 ],
 "x-features": [
  "level-alerts",
  "webhooks"
 ],
 "examples": [
  {
   "version": 1,
   "id": "evt_3f9a0c6e21d4b7a8e5f10c2d",
   "type": "interest_move",
   "symbol": "SPX",
   "level": {
    "kind": "level_of_interest",
    "value": 6650,
    "rank": "P1",
    "from": 6700
   },
   "price": 6712.25,
   "book": "volume+open_interest",
   "ts": "2026-10-21T10:35:05-04:00",
   "day": "2026-10-21",
   "levels": {
    "flip": 6715.5,
    "call_wall": 6750,
    "put_wall": 6700,
    "put_support": 6700
   },
   "text": "SPX P1 moved from 6,700.00 to 6,650.00 · VOL + OI",
   "direction": "down"
  }
 ],
 "x-source": "alerts",
 "x-product": "live",
 "x-plan": "live",
 "x-version": 1,
 "x-since": "2026-10-21",
 "x-switch-on": "Account, Level alerts: a webhook address, and the levels of interest card on with the event, the symbol on that card."
}