Traditionally a 1 pip move in the market was the smallest move that a currency could make. Another way of looking at this is that a 1 pip move in the market is a move up or down by 1 of the number sitting the furthest to the right of the decimal point in the forex quote.
As most currency pairs have 4 decimal places a 1 pip move in the market would be a move up or down by 1 of the number sitting in the 4th decimal place spot in the quote. So for example the EUR/USD currency pair is trading at 1.5678 as of this lesson so a move to 1.5679 would be a 1 pip increase in the quote and a move to 1.5677 would be a 1 pip decrease.
In the JPY based currency pairs where there are two decimal points, a 1 pip move in the market would be a move up or down by 1 of the number sitting in the second decimal point spot. So for example as of this lesson USD/JPY is currently trading at 101.28. With this in mind a move to 101.29 would be a 1 pip move up in the market and a move to 101.27 would be a 1 pip move down in the market.
As electronic platforms have brought greater price transparency to the forex market and price competition has heated up some platform including the one that we have been using have added an additional decimal place to their quotes. Known as Fractional pips, now many of the currency pairs which have traditionally been 4 decimal places quoted out to 5 decimal places and the pairs which have traditionally been quoted out to 2 decimal places quoted out to 3 decimal places.