描述
⋅ * System long only (for shares).
* Enter if Vortex up crosses up vortex down and there is the classical second test of a close higher than previous' high
* Exit if
a) RSI crosses under 70 OR
b) on the contrary, Vortex down crosses up vortex up and there is the classical second test of a close lower than previous' low
* fixed money management to be optimized added.