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Thread: 抛物线转向指标:sar

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    Default 抛物线转向指标:sar

    一、sar原理及计算

    Sar即停止转向指标因一连串的停止点构成抛物线形状,故也将sar称为抛物线转向指标。

    Sar的计算式分为上升式与下降式,即:

    上升式sar2=sar1+af(h1-sar1)

    下降式sar2=sar1+af(l1-sar1)

    式中:sar1──昨日sar值,其上升式初始值取近期最

    低价,其下降式初始值取近期最高价

    H1──当前最高价。

    L1──当前最低价。

    Af──威尔特加速因子,基值为0.02,当价格每创新高(上升式)或新低(下降式)时

    按1,2,3......倍数增加,直到0.2为止,即af=0.02~0.2。

    从算式可见,当把sar1初始值取近期最低价,即视行情为上升时,必须满足当前最高价h1>sar1的条件。一旦h1<sar1,则下降式启用,并且行情持续下降时,必须满足当前最低价l1<sar1的条件。而加速因子的设置,反映了行情"起动→加速→减速→零→反向起动"的变化过程,也造成了抛物线的视觉效果。

    二、sar的应用

    1、当sar落至价格曲线下方时发出买入信号。

    2、当sar越至价格曲线上方时发出卖出信号。

    3、在动向指标dmi确认市场为有趋势市场时,sar指标发出的买入卖出信号其技术上的可信度才是高的。

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    Default

    Sar即停止转向指标因一连串的停止点构成抛物线形状

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    Default

    sar按趋势的转化是不错的

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