Resize Within Broker Notional

This message indicates that a resize action calculated a target quantity your position is already close enough to that the order needed to reach it would be worth less than the broker accepts. This is a separate floor from the smallest order size: a broker can accept the quantity and still reject the order because what it is worth falls under a minimum value. Rather than send an order that cannot fill, TradersPost leaves the position where it is.

Alpaca enforces this on crypto. An order whose cost basis is under $10 is rejected with "Cost basis must be >= minimal amount of order 10", whatever the quantity. Because a fee taken in kind leaves a gap proportional to the position, a large enough position can sit a hair off its target and still produce an order above the minimum quantity but under $10.

The message names the gap, the target, what the gap is worth, and the smallest order value that broker accepts, so you can see how far off you are.

For example, if your open ETHUSD position is 0.0049925 and you send a target of 0.0065, the order needed is 0.0015075 — worth about $4 at a price near $2,750, under the $10 minimum — so no order is submitted:

{
    "ticker": "ETHUSD",
    "action": "resize",
    "quantity": 0.0065
}

This outcome does not cancel the take-profit, stop-loss, or other orders already resting on the position, because the position is unchanged.

A resize with a quantity of 0 never ends this way. It asks to close the position, so the closing order is sent whatever it is worth, exactly as an exit would send it, and the broker decides whether to accept it.

The minimum is a dollar value, so it only applies to symbols priced in US dollars. A pair quoted in another currency — ETH/USDT, for instance — is not measured against it.

Only some brokers enforce a minimum order value. Where a broker enforces none, this message cannot occur and the resize behaves as it always has: any difference above the broker's minimum quantity is sent, and the broker decides whether to accept it.