Basis points or pips

A foreign exchange rate usually consists of an integer part and 4 decimal points (or 2 decimal points when expressed per 100 units like e.g. dollar/yen). Thus the decimals are expressed either at 10th thousands or hundreds. Each such 0.0001 or 0.01 is called basis point or pip. E.g. a 50 pips change of 1.5000 is either 1.5050 or 1.4950.