TCR stands for Target Collateral Ratio and it is shown in percentage. This ratio expresses what percentage of USDC token is required to mint UPFI token. E.g., if the time weighted average price of UPFI token in the past hour is more than $1.00, then the protocol lowers the TCR by 0.25%. If it is less than $1.00, then the protocol increases the TCR by 0.25%. TCR can increase or decrease by maximum 0.25% per hour and maximum 6.00% per day.