Contract limits, micros and scaling plans

Your firm caps how much size you can hold. This article explains how that cap is counted, why micros count as a fraction of a mini, and how the cap can grow with your account.

Your own figure is on the account detail sheet: open Trading Accounts and select the account. It is shown already adjusted for micros.

This is the part that surprises people. Your contract cap is measured against your open positions plus your working orders, across every instrument at once, not per symbol and not on fills alone.

So a resting limit order that has not filled still consumes part of your cap. If an order is rejected for size while you feel well under the limit, unfilled working orders are the first thing to check.

Orders that reduce your exposure are always allowed through, so you can never be blocked from getting smaller.

Caps are expressed in mini-equivalents, and micro contracts count as a fraction of one mini. The ratio is set by your firm and is 10 to 1 by default, so ten micros use the same room as one mini.

That means a cap of 3 minis is also 30 micros, or any mix that adds up the same way.

If your account includes Binance BTCUSDT perpetual futures, that market carries its own position limit in its own units, independent of the futures contract cap. A limit on Bitcoin does not consume futures room, and vice versa.

Some firms raise your cap as the account grows rather than fixing it at the start. If yours does, the limit unlocks in tiers, and the basis your firm chooses matters a great deal:

Thresholds may be expressed as profit made or as an absolute balance, and tiers can be fractional, so a limit of 5.5 minis is perfectly normal.

If your cap changed without you doing anything, a scaling tier is the usual explanation.