If Eurodollars break to upside, which is indicative of the fed about to drop rates. This is a much safer play than shorting the market as the risk is much lower. You can go long eurodollar futures or futures options (I like the call options) using tastyworks which has some of the lowest fees.
my referral link if interested: start.tastyworks.com/
my referral link if interested: start.tastyworks.com/