Wagner Matching Engine — US4903201

US4903201 · "Automated Futures Trading Exchange" · Susan Wagner, filed Nov 1983 · EXPIRED — public domain

Place Order WHEAT-84

Buy Sell

Limit Market

Price Size

Your Open Orders

Your Fills

Last Match Sequence

Order Book last —

Trade Tape

Last Price

This exact mechanism, patented in 1983, is how CME Globex and every modern exchange matches orders today — patent expired, mechanism free.