This script should be extended to handle cases where the resulting conversion is lower than 1. Most common example would cryptocurrencies such as Bitcoin. Because the ration is so huge, and a single dollar is worth less than 0.0001 BTC, more decimal spaces are needed to properly display the resulting conversion.

In the current implementation, conv 1 USD BTC would result in 0.00 BTC, which is obviously incorrect. What the script should do instead is check whether the resulting conversion is lower than 1, and format the result using an alternate decimal places property. Say, MICRO_DECIMAL_PLACES.