Cross

true only on "the bar where the cross happens" — a crosses up/down through b (stateful, unlike Compare which stays true every bar)

When to use: Used as an entry trigger: EMA20 crossing up through EMA50 = enters once at the cross, not on every bar where 20 > 50

Ports

• in-a — The moving line (fast)
• in-b — The reference line (slow)
• out-result — true only on the crossing bar

Params

• op — cross_up / cross_down

Used in these recipes

• Trend-follow — EMA Cross