Yes, very astute there Mr. Silverthorn.
Playing for the swap is also called the carry trade, do a search for that and you will find a lot of helpful information. It used to be more mainstream but the banks change the swap rate. Some currencies actually have a negative swap for both buy and sell now.
There is another long hold way to profit from the swap plus a little more. Look for a currency where the price is very low and the currency pair has a positive swap for buys then buy about 10% of what you wanted to invest then when the market moves away from center maybe 50 pips buy another 10%. At some point the price will begin to move toward center and you cash in collecting all the swap on the way, Plus the profit from the trade.
Cycles are from 1 to 3 years so you may be holding for some time. Don't put all of your money into trades. Sorry, I should have mentioned this first, there are brokers that will pay a small percentage on the portion of an account not used for trading. You will be able to get money from the long hold trades plus swap and the money that you keep in the account will protect against draw-down and still make a small percentage of interest from the broker.
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