The current exchange rate for the Bangladeshi Taka (BDT) is 101.3498 BDT per American Dollar (USD) as of the time this was written. The BDT reached a high of 104.4762 BDT per USD, and a low of 93.0093 BDT per USD during the last 90 days. The average exchange rate over the last 90 days was 95.9107 BDT per USD.
The average volatility of the BDT against the USD was 0.24% over the last 90 days. This is a not a particularly volatile currency, although the BDT has been somewhat less stable in the recent past. You can reasonably expect minor but sporadic fluctuations to continue going forward, barring any unforeseen circumstances.