The Currency Strength Index is calculated in real-time, on every tick. The calculations are based on the 1 minute time frame. The colored indicator bars and percentage values for each currency are updated automatically every 5 seconds. It is relatively easy to find articles about trading systems that achieve positive long term historical results on highly liquid Forex pairs. However this becomes more difficult as we move to more exotic pairs since trading costs generally make the development of profitable trading systems for these symbols harder. The entry and exit rules are shown below. For instructions on how to access the free forex data, click here.