Posts  / #POST-235910
REDDIT

The "Rule of 390" is completely broken in today's options market. It needs to change to Fills Only

U
May 19, 2026 · 20:19

Can someone make sure this gets to the right people who actually have the influence to change it?

The "Rule of 390" (which designates you as a "Professional Customer" if you average more than 390 orders a day in a month) is completely outdated. Right now, exchanges count every single modification and cancellation toward that limit.

In today’s fast-moving market, if you are trading multi-leg spreads or trying to walk a limit price to get filled, you have to constantly edit or cancel/replace your orders just to keep up with the shifting underlying asset or market makers. If you run a simple script or just active manual adjustments, you can hit that 390 limit in a heartbeat without actually executing more than a handful of trades.

It makes zero sense that cancellations and edits count toward a metric that strips you of retail priority. The rule should strictly be based on **fills only**. If an order isn't executing, it isn't taking up liquidity or acting like an institutional market maker.

We need the exchanges and regulators to look at modern market structure and update this. If anyone here has compliance channels or institutional ties, please push this up the ladder. It’s actively punishing active retail traders for just trying to get a fair fill.