Currency guides for travelers

Three short guides on how exchange rates work, written so you can act on them at a market stall or a card terminal.

• What is the mid-market rate?The reference rate before margins, and how to measure the markup you are offered.
• Pay in local currencyWhy "pay in your own currency" often costs more, and a ten-second check.
• Convert prices fast while you travelAnchors, favorites and offline rates for the moment of purchase.