This is because you need to consider your forex trading account's base currency and the current price of the currency pair you intend to trade. (tradingsetupsreview.com)
It involves trading within a steady and predictable range of prices of a currency. (adigitalblogger.com)
After a resistance level is broken there is usually a change in the bid / ask price of the currency, and sometimes leaps upwards. (forexfloor.com)