This trading advantage will boost the country's economy, thus boosting the value of its currency. Therefore, whether your interest is short-term trading as a scalper, we have you covered! A long position means that you want to buy the base currency and sell the" currency. 6 2 Determine your margin. Note on the far right side of the chart an inside bar formed at a key support level, the market then broke back the other direction and made a nice move higher from the inside bar / stalling pattern that formed at a previous level.