The flow of money for a currency is measured by the Money Flow Index (MFI), measured over time (usually days, eg 30 days). In the index, 0 is the lowest value and 100 the highest value, and so the index per day shows whether, for a particular day, the currency is 'up' or 'down'. Typically, if an index shows 80 then the currency is 'overbought' (worth significantly more than the average has been lately), whereas 20 would be 'oversold' (the currency is trending downward in value).
The brook beside you feeds into the North Sea, via our own Sidetracked cache at Norton Bridge, the River Sow, and the Trent. Just over the ridges to the west and north of you the water flows into the Atlantic, via the Severn.
Such is the flow of water…