NEW YORK (TheStreet) -- Commodities have seen a strong run up as the U.S. dollar has been under constant pressure for the past month. The issue remains that although oil and gold have risen, countries exporting them have not seen similar strength.

The first example below is of the chart

CurrencyShares Australian Dollar Trust

(FXA) - Get Report


CurrencyShares Japanese Yen Trust

(FXY) - Get Report

. This pair measures the strength of the Aussie/Yen currency cross.

The Aussie is heavily linked to commodities and rises when copper and gold outperform, as well as when the Chinese economy shows support. It is a heavy exporter to China, which explains its link to their success.

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On the opposite side of the trade resides the Japanese yen. The yen has seen selling pressure throughout 2013 due to the unprecedented amount of stimulus the Bank of Japan has embarked upon. In recent months, however, the efficacy of their stimulus has come into question, and a weaker global economy has brought demand for the safe haven currency.

The Aussie dollar sold off on Tuesday as weak economic data from the country sparked the debate over Australia's next rate cut. During a speech, Reserve Bank Governor Stevens claimed that Australia's interest rate should accurately reflect their economic circumstances.

Market's interpreted this to mean a potential cut at their next policy meeting.

Although commodities have shown strength, it looks as if weakness from China and other importing countries is weighing on demand.

The next chart is of

iShares MSCI Brazil Capped

(EWZ) - Get Report


Vanguard Total World Stock Index ETF

(VT) - Get Report

. This pair measures the strength of Brazilian equities over world equities. It is clear that Brazilian equities have underperformed over the past year.

Brazil, too, is a commodity exporting country like Australia. The GDP growth has diminished to below 3%.

This puts growth below some economies in the developed world. Weak global demand will continue to weigh on them, and a stronger dollar could push even more funds out of the country as investors favor U.S. Equities during times of dollar strength.

The last chart is of

PowerShares DB Commodity Index Tracking

(DBC) - Get Report


CurrencyShares Swiss Franc Trust

(FXF) - Get Report

. This compares a basket of commodities priced in the Swiss franc.

Commodities have come under pressure over the past few weeks as

United States Oil

(USO) - Get Report

has formed a top reversal pattern and

SPDR Gold Shares

(GLD) - Get Report

has reached strong overhead resistance.

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This has led the commodities basket to fall. The pair is quickly reaching its yearly lows, and hawkish statements from the

Federal Reserve

could push commodities to even lower levels.

At the time of publication the author had no position in any of the stocks mentioned.

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This article was written by an independent contributor, separate from TheStreet's regular news coverage.

Andrew Sachais' focus is on analyzing markets with global macro-based strategies. Sachais is a chief investment strategist and portfolio manager at the start-up fund, Satch Kapital Investments. The fund uses ETF's traded on the U.S. stock market to gain exposure to both domestic and foreign assets. His strategy takes into consideration global equity, commodity, currency and debt markets. Sachais is a graduate of Georgetown University, where he earned a degree in Economics.