SWIFT ISO 15022 - Code LMTO Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Limit Order: Order to buy at the indicated price limit or lower or an order to sell at the indicated limit price or higher. Usages Message type Field number Tag MT502 (Order to Buy or Sell) 18 22a (Indicator) MT513 (Client Advice Of Execution) 35 22a (Indicator) MT576 (Statement of Open Orders) 43 22a (Indicator)