An Iron Condor isn’t one order — it’s four. Four legs that need to execute together, at the best possible net price, in the same instant. This is where Smart Routing stops being a technical curiosity and becomes a measurable edge: it doesn’t just look for the best price on one option, it looks for the best price on the whole combo.
The problem with executing 4 legs at once
In an Iron Condor you sell a put spread and a call spread at the same time. Each of those 4 options can have the best price on a different exchange at that exact millisecond: the short put might have the best bid on CBOE, while the protective long call has the best ask on NASDAQ Options.
If you sent all 4 legs to a single exchange, you’d accept whatever price that venue offers for each one — even if a better price was one click away somewhere else.
Smart Routing evaluates the net price of all 4 legs together, not each leg separately. It can cross leg 1 on one exchange and leg 3 on another, if that improves the total net outcome of the trade.
How it works in practice
- Evaluates the available net credit for the full combo across dozens of venues simultaneously
- Can split and send different legs to different execution venues
- Adjusts within milliseconds if the market moves while the order is still active
- Always prioritizes the total net credit, not the price of any single isolated leg
A numbers example
Picture an Iron Condor where the theoretical “mid-price” credit for each leg adds up to $1.20. On a single exchange, with less price competition, you might end up collecting $1.05. With Smart Routing searching multiple venues for each leg, you’re more likely to get closer to that theoretical $1.20 — a 15-cent-per-contract difference that, multiplied by your number of trades per year, stops being trivial.
Smart Routing doesn’t “create” liquidity or better prices out of thin air — it simply finds and captures liquidity that already exists, scattered across different venues. The more fragmented an asset’s market is, the more valuable this technology becomes.
Why this matters especially in options
Unlike stocks, the options universe has far more instruments (every strike-and-expiration combination is a separate contract), which spreads liquidity even thinner across execution venues. For multi-leg strategies like the Iron Condor, the Butterfly, or Calendar Spreads, this fragmentation gives smart routing more room to improve than a simple stock purchase.
If you trade these strategies with ProRealTime connected to Interactive Brokers, you benefit from this on every combo you send, with nothing to configure.
Conclusion
On a single-leg spread, Smart Routing improves one price. On a multi-leg spread like the Iron Condor, it improves a four-variable equation at once, hunting for the best possible net outcome across dozens of trading venues. It’s probably the scenario where this technology delivers the most real value per trade. You can read the full explanation of the system in our article on Smart Routing.
