Hi Dmooy,

Glad to hear from you.

There is no set time period that you have to be in a trade before rollover, as long as you are in at the time your broker designates for rollover, then you are in.

There are traders who try and take advantage of rollover in the manner that you have suggested, however the market tends to adjust to this and shake these people out by trading in a manner that makes it difficult for them to get in the trade at rollover and then out before the market moves against them enough to wipe out any profit opportunity.

In addition to this, a trader must factor in the spread for the currency pair he or she is trading, which normally is greater than the rollover amount that would be paid.

Hope that helps. If there are any other questions or comments on this one please feel free to post them below.

Best Regards,
Dave

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Disclaimer: Trading is risky and can result in substantial financial loss. As always my posts are simply one traders opinion and should not be taken as trading advice. I am not a financial adviser so everyone please do their own analysis and take responsibility for their own trades.