Fixing the rate is especially important for cash transactions, as there is a certain time between creating a request and the actual issuance of UAH. If you need to exchange Tether TRC20 for Cash UAH, it is advisable to first check the rules of the selected performer: some platforms fix the rate when the request is made, while others calculate it after the USDT arrives. For the TRC20 USDT to hryvnias direction in Lutsk, the local reserve also matters. Even if the exchange service has a large total reserve of hryvnias, it does not mean that the entire volume is available for issuance specifically in Lutsk. Therefore, it is advisable to agree on the size of the exchange before the crypto leaves the sender's wallet. The fixation period may also be limited; for example, the service may only retain the selected conditions if the USDT arrives within a specified period, and if there is a delay, it will recalculate. For this reason, before confirming the transfer, it is necessary to understand at what point the rate is determined and what will happen if the second transaction or the sending itself is delayed.