We recommend setting your gas limit to 150,000. Our average gas cost is typically much lower, but we recommend 150,000 as an upper bound to ensure your transaction completes successfully.
For gas price, we recommend looking to https://www.ethgasstation.info/ for current network prices.
TrueUSD is the lowest gas-cost stablecoin on Ethereum today. See our blog post on how our GasBoost feature achieves this, saving transaction costs for traders, dApps, and exchanges.