- Investor tools used to graphically display both current and historical data for contracts, futures, or equities using any chosen unit of time. Specific time periods can be taken out of the normal time stream and analyzed in a different context. This approach allows the data to be filtered to remove or isolate extraneous effects or trends. For example, specific months of the year (such as March) can be used to build an artificial time line that excludes the rest of the year to remove seasonal effects over many years. This technique is useful for spotting hidden, underlying trends in the Forex market.