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I don’t understand the question. If you short the EUR/USD at 1.1585 and close your trade at 1.1320, then you’ve made 265 pips profit. On one lot, that’s clearly $2,650 (less any dealing costs, if not already included).
The calculation for one lot is (11,585 - 11,320) x $10 = $2,650, because one lot represents $10 per pip.
I think so, yes. But I can’t tell what, from your question - sorry.
5.5 lots does sound about right, though, at the exchange-rate you mentioned. (I made it 5.51 lots when I worked it out, I think). €12,914.31 for 5.5 lots is €2,348.056 per lot, and that’s $2,657.99 per lot, at an exchange-rate of 1.132, so it looks about right, anyway?
I should add that it is unwise to place a position size based on how much money you want to make. Obviously it should start with taking a sensible risk based on the size of the equity in your account. History is littered with guys who set out to make the market buy them a fur coat but the market took their shirt instead.