As a representative of the US Federal Reserve's hawkish stance, Waller said that recent economic data may lead to the Fed taking a more cautious approach to interest rate hikes. However, before inflation fully falls, the Fed still needs to maintain high interest rates. Today's release of August's ISM non-manufacturing PMI will be a key focus for markets. If this data comes in below expectations, it could weaken expectations for further rate hikes, putting pressure on the US dollar and benefiting other assets. Technically, the 105 level is an important resistance that may see profit-taking by long positions, while support around 104 is worth watching to see if it holds firm.