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Cboe Silexx Adds Listed Options Leg Support to FLEX Orders

CBOE Silex

Cboe Silexx, the multi-asset OEMS used by institutional and professional traders, has rolled out version 25.7, adding key upgrades for options trading.

FLEX Orders Now Accept Listed Option Legs
Traders can now build FLEX orders with both FLEX and listed option legs, streamlining complex multi-leg strategies without splitting tickets. Listed contracts can be dragged from the option chain or added manually via strike/expiration selectors.

Other notable upgrades include:

  • ITM/OTM shading on the option chain for quick visual clarity
  • Smarter strike selection when modifying legs
  • Faster multi-position editing in Position Analyzer
  • Contextual confirmation messages for AWAY-routed orders
  • Desktop API support for external app integration

For high-level traders using FLEX and advanced options workflows, these updates reduce friction and speed up execution.