Build trading systems. Not spreadsheets.

01 export const script = {
02   name: "ema-cross", version: "1",
03   sources: ["candles"],
04   lookback: 100
05 }

06 export function onData(ctx, input, history) {
07   if (input.source !== "candles@hyperliquid@mmt") return
08   const candles = history.source("candles@hyperliquid@mmt"); if (candles.length < 51) return
09   const fast = ctx.study.ema(candles, {
10     field: "c", window: 20
11   })
12   const slow = ctx.study.ema(candles, {
13     field: "c", window: 50
14   })

15   if (fast.previous <= slow.previous &&
16       fast.latest > slow.latest) {
17     const entry = ctx.trade({
18       key: "ema-cross-" + candles.at(-1).t,
19       position: "open-long", margin: 1000, leverage: 5,
20       order: { type: "market" }
21     })
22     return { metrics: {order_id: entry.id } }
23   }
24 }

25 export function onExecution(ctx, event) {
26   return { metrics: {event: event.type, order_id: event.orderId } }
27 }