Fake Trap is a Normal Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Fake Trap is Unlimited.
YGOPRODeck lists Fake Trap for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Fake Trap appears in Dark Beginning 1 (DB1-EN164) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Fake Trap is about $0.13 on Cardmarket (prices change frequently).
