The dollar rose to a two-week high against the euro Tuesday after a report showing U.S. consumer confidence deteriorated sharply in October boosted the greenback's safe-haven appeal.

The U.S. dollar rallied from a 14-month low against the euro Monday as falling stock and commodity prices dampened risk appetite, prompting investors to lock in recent gains in other currencies.

The dollar and euro soared against sterling Friday after data showing the UK economy was still mired in recession stunned investors who had expected it to return to growth.

The dollar rose broadly Thursday as most investors bet the greenback's recent sharp slide against major currencies had gone too far, too fast.

Japan's exports edged lower for the third consecutive month in September as a rising yen weighs on overseas shipments and the stocking of inventories starts to wane.

If you really want to understand the implications of the falling U.S. dollar, make a run for the border—the U.S./Canadian border, where currency fluctuations are felt just about everywhere money changes hands.

The American currency is under siege.  It is trading near 14-month lows and there are questions about whether it  deserves its status as a reserve currency.

The dollar hit a one-month low against sterling Wednesday and the euro broke above $1.50 for the first time in 14 months as expectations that U.S. interest rates will remain low weighed on the greenback.

The dollar rebounded Tuesday from a 14-month low against a basket of currencies as policymakers in Europe and Asia remarked on its decline and options-related buying kept it from pushing though $1.50 per euro and 90 yen.

The dollar hovered near a 14-month low against the euro Monday as investors bet the Federal Reserve will hold U.S. interest rates near zero well into next year.

The recent weakness in the dollar index is likely to continue and it could soon hit an all-time low of 70.65 points, Royce Tostrams, technical analyst from Tostrams Groep, told CNBC.

The dollar rallied Friday as risk tolerance dropped on data showing U.S. consumer sentiment eased in October and prompted safe-haven buying.

Talk of the perils of dollar weakness has been exaggerated for three decades—and in that way are somewhat comical--while predictions of its demise as the reserve currency is premature. The dollar saga is also the stuff of a short memory.

Oil prices are coming down from August highs, while the Standard & Poor's 500 index is approaching levels where it will find it hard to move higher, Chris Locke, managing director at Oystertrade.com Management, told CNBC Wednesday.

The dollar is clearly stuck in a downward trend as it takes over from the yen as the carry-trade currency of choice, but if the trend continues it faces a “fully-fledged dollar crisis,” Robin Griffiths, technical strategist at Cazenove Capital, told CNBC.