Every trade runs on machinery: the order you send, the rules that govern trading, the auctions that open and close the day, and the expiration mechanics of options. This hub maps all of it — the plumbing that turns a decision into a filled, managed position.

Order types: getting in and out

Halts & circuit breakers

Auctions & the close

Assignment, exercise & expiration

Market plumbing

NoVo maps every dealer level across SPY, QQQ & IWM and shows what its own record says that setup has done before, with the sample size built in. See Trader · Crypto, Analyst, or compare plans.

Why this matters

You don’t need to master every detail here, but the difference between a trader who understands this machinery and one who doesn’t shows up in fills, in exits, and in not getting blindsided by a halt or an assignment. Every one of these decisions is yours to make at your own broker, which is exactly why knowing what’s under the hood pays. Start anywhere above.