It is hard to determine the best level one should use, as it mainly depends on the trader's strategy and the actual vision of upcoming market moves. As a rule of thumb, the longer you expect to keep your position open, the smaller the leverage should be. This would be logical, as long positions are usually opened when large market moves are expected. However, when you are looking for a long lasting position, you will want to avoid being 'Stopped Out' due to market fluctuations.
The bottom line is that you want to pick carry trades that benefit not only from a positive and growing yield, but that also have the potential to appreciate in value. This is important because just as currency appreciation can increase the value of your carry trade earnings, currency depreciation can erase all of your carry trade gains – and then some. 
FOREX.com is a registered FCM and RFED with the CFTC and member of the National Futures Association (NFA # 0339826). Forex trading involves significant risk of loss and is not suitable for all investors. Full Disclosure. Spot Gold and Silver contracts are not subject to regulation under the U.S. Commodity Exchange Act. *Increasing leverage increases risk.
My details: (1) Entry @ 0.68310 (Sell Limit) (2) Stop loss @ 0.68370 (6 pips) (3) Target @ 0.68190 (18 pips) - Closing 90% - S/L @ break-even (4) R:R = 1:3 min. Stay tuned for the updates Follow and leave a like if you liked this idea and want to see more! *DISCLAIMER* This post is solely for educational purposes and does not constitute any form of investment...
Between 2003 and the end of 2004, the AUD/USD currency pair offered a positive yield spread of 2.5%. Although this may seem very small, the return would become 25% with the use of 10:1 leverage. During that same time, the Australian dollar also rallied from 56 cents to close at 80 cents against the U.S. dollar, which represented a 42% appreciation in the currency pair. This means that if you were in this trade – and many hedge funds at the time were – you would have not only earned the positive yield, but you would have also seen tremendous capital gains in your underlying investment. 
With Equivolume, you can plot price and volume activity on a single graph, instead of having volume added as an indicator on the side. This tool draws the bars following their traded volume at a precise point in time (the wider the bar, the bigger the volume). That creates a clear visualization of the volume increase or decrease of an asset’s diagram. A very handy feature for those strategies whose key factor is volume. How to change your table into Equivolume

Currencies are traded on the Foreign Exchange market, also known as Forex. This is a decentralized market that spans the globe and is considered the largest by trading volume and the most liquid worldwide. Exchange rates fluctuate continuously due to the ever changing market forces of supply and demand. Forex traders buy a currency pair if they think the exchange rate will rise and sell it if they think the opposite will happen. The Forex market remains open around the world for 24 hours a day with the exception of weekends.
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