https://betting.betfair.com/betfair-announcements/whats-new-on-betfair/the-betfair-beacons-keep-track-of-price-moves-170423-204.html

Betfair are making it easier for horse racing customers to keep track of price moves on the Exchange markets with a new and innovative feature.

The Betfair Beacons will show you in an instant which horses are popular in the market and which are not.

What are Betfair Beacons?

The Betfair Beacons will appear as icons next to selections in the horse racing markets. Some will be fire or ice emojis while others will be arrows indicating whether a selection’s price is trending up or down the market.