post_value

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What POSTING a resting order is worth versus CROSSING the spread, per venue, for a crypto perp. Use for "should I use a limit order or market order", "what does paying the spread cost me", "which venue should I quote on", "is it worth being passive here", "maker vs taker". Returns per venue: the current spread in bp, taker and maker fee, the value of posting per side, and the round trip (2x, because a position is opened and closed). Ranked by posting value. Pass `notional_usd` to price the crossing side as the real walk down the book instead of half the spread — a larger and more honest number at size. MEASURED across 54 coin-venue pairs: median 4.09bp per side / 8.17bp round trip, mean 4.63bp, p90 6.72bp. Wide-spread names go much further (ARB 20.31bp round trip, OP 19.33bp, DOT 19.70bp). Note SOL at a 0.13bp spread is still worth 4.07bp per side — on a tight book the whole of the value is the maker/taker FEE DIFFERENTIAL, which does not shrink as spreads tighten. That is a floor, and it is why this holds up on liquid majors where cheapest_venue has almost nothing to choose between. YOU MUST STATE THIS WHEN QUOTING ANY NUMBER FROM THIS TOOL: it is the SIZE OF THE PRIZE, NOT THE PROBABILITY OF WINNING IT. A resting order that never fills does not save the spread, it costs the trade, and that is routinely worth more than the basis points here. EnsoTrade does NOT estimate fill probability — that needs order-book time series this service does not log — and does not approximate it. Never present posting as free money. Also read `cross_vs_post`: the best venue to POST on is frequently NOT the best venue to CROSS on, because maker fees and spreads rank venues differently from depth. Where they differ, the answer is to rest on one and take on the other. `coin` = ticker e.g. 'sol'. Requires an EnsoTrade Pro API key.