描述
這是一個使用簡單，卻有效的作業系統。
系統中包含了四條線，進場線、進場線2、出場線、出場線2。
使用上就是當空手要建部位時，看兩條進場線，
在兩條線的下方布空，在兩條線的上方布多，一上一下則自行斟酌。
而當手上有部位時，則看兩條出場線，有跌破任一條時就可以考慮出場。
This is a simple to use, but effective trading system.
There are four lines included in the system, entry line, entry line 2, exit line, exit line 2.
When you have no any position, look at the two entry lines.
Under the two lines builds short position, above the two lines builds long position, one above and one under takes no action.
When you have position in your hand, look at the two exit lines, and if it break out either one, you can consider exit.
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