The dollar rose broadly Thursday as several policymakers around the world warned the economic recovery was fragile, prompting investors to take profits on gains in higher-yielding currencies and assets.

The dollar rallied from a 15-month low against major currencies Wednesday in a technical rebound after selling pressure failed to push the U.S. currency through key levels.

The dollar firmed Tuesday from the 15-month low touched in the prior session as investors saw Monday's fall as too far, too fast.

The dollar fell to a 15-month low against a basket of major currencies Monday and the euro rose above $1.50 after the Group of 20 pledged to keep emergency stimulus spending in place until a global recovery is assured.

The dollar is likely to trade higher in the week ahead, with Friday's worse-than-expected U.S. non-farm payrolls data for October seen as the driving force for currency markets at least until mid week.

The dollar and yen rose Friday after a report showed the U.S. unemployment rate spiked and the economy lost more jobs than expected, stoking concerns about the U.S. economy and restoring safe-haven demand for both currencies.

The dollar held steady against a basket of currencies Thursday, a day ahead of a key government jobs report that will shed light on the health of the U.S. economy.

The dollar fell in choppy trading against the euro Wednesday after the Federal Reserve left interest rates steady, as expected, and said it intends to keep interest rates low for some time.

The U.S. dollar rose to a one-month high against a basket of currencies Tuesday as concerns about the global banking sector and weaker equity markets boosted the greenback's safe-haven appeal.

The dollar and yen fell Monday as improving economic data worldwide and rising stock prices eroded the greenback's safe-haven appeal.

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 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.

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.