Visualization Technique for Linked Changes in Exchange Rates Between Three Currencies

A line chart is mainly used to represent the change in exchange rate between two currencies. To figure out the trend of the exchange rate be-tween two currencies, it is important to under-stand how the two currencies move in relation to another currency. We developed as a new visual-ization technique, called a linked triangle chart, for representing linked nature of exchange rate changes between three currencies. The linked triangle chart uses the coordinate system of a tri-angular chart. In this paper, we describe this new chart and Eel, a tool implementing it. From tri-als, we confirmed that some events which are dif-ficult to find on a line chart become obvious on the linked triangle chart