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你看天气预报是想知道明天几度会不会下雨
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当你打过卫星云图的时候
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想法不太一样
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你不是想听一个预测
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你是想看清现在台风眼在哪
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风带往哪边吹
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冷风暖风是怎么弄在一起的
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云图不告诉你明天一定发生什么
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但那把你肉眼看不到的大气结构
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拍成了一张能读懂的图
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交易的指标干的就是卫星云图的事
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价格在涨跌
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你一眼能看到
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但价格背后的结构趋势往哪个方向走
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走的力度够不够
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这些东西肉眼就不太容易
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一次看全了指标
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做的事就是把价格波动里藏着的这些结构特征
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翻译成你能直接读懂的东西
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但绝大多数人用指标方向一开始就偏了
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打开行情软件
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MACDKDJRSI全加载上
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然后盯着金叉死叉问接下来是涨还是跌
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你等于打开卫星云图
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指着上面一块白云问明天会不会下雨
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他回答不了
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你不是云图不行
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是你问了一个他设计上就没打算回答的问题
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臣妾做不到啊
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指标只能做一件事
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告诉你现在处于什么状态
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至于接下来怎么走
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就超出了他的能力范围
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它的边界就停在现在
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那为什么还要这么多人把指标当预测工具用
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因为金叉之后有时候确实涨了
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顶背离之后有时确实跌了
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你见过几次蛋蛋就自动给它们连上一根线
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金叉等于要涨
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但你不太会注意到
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金叉之后跌的次数一样不少
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背离之后继续背离的情况也经常发生
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你记住的是对的那几次
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忽略的是错的那几次
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这在心理学上叫确认偏误
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你看见你想看见的
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大脑会自动帮你把反力过滤掉了
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但比这个心理偏差还更要命的是
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指标本身的数学结构就注定了它不能预测
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所有指标都是对过去价格的二次计算
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均线是过去的N天的平均值
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MACD是两根均线的差值
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而S是过去一段时间涨跌幅的比例
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价格先动指标后算
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它们之间天然有一个时间差
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你再问一个用昨天数据算出来的数字
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明天会发生什么
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他不可能答得上来
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所以把那个问题换掉
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别问接下来会涨还是会跌
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问现在行情处于什么状态
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这两个问题之间的差别就是预测和诊断的差别
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诊断之后怎么做
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那是你的事
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但诊断准没准是指标的事
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那它能诊断什么
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两件事就够了
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第一趋势方向最简单的方法就是看均线
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页面50在页面100上方
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两条线都向上倾斜
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这就是典型的多图排列
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它不告诉你明天涨不涨
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单单告诉你一个事实
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从过去一段时间的价格结构看
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买方一直跑在卖方上面
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趋势方向是向上的
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这个事实本身就有价值
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在多头排列的环境里
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你只找做多的机会
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不做空不逆势
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这不是预测
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是顺着当前状态的方向做
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什么时候趋势算结束了
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等你看到两根线开始走平
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缠绕甚至死叉
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那时候状态就变了
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你再调整
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不用提前猜
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等形态直接走出来
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第二极端边界RSI上的80以上
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意味着过去一段时间的涨势几乎一边倒
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买方用力过猛了
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他不告诉你马上要跌
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但他告诉你一个状态
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价格现在站在一个历史上容易被压回来的位置
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布林带上轨也是类似的作用
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价格跑到距离均值两个标准差的地方
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本身就是一种偏离
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在这些位置不是说不能做多
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但你应该多留一个心眼
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止损设得更紧一点
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或者等价格回踩均线确认了再进
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边界的作用不是给你一个你是信号
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而是提醒你
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现在这个位置比别的位置更容易出意外
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这两类诊断合在一起
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给你的不是知道接下来怎么办
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而是知道自己现在站在哪
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在趋势明确的时候
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顺着方向走
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在集团边界附近
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守着点力气
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你不预测
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你只是根据当前的状态
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做概率上对自己更有利的决策
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讲到这里
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你心里大概有个疑问了
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如果指标只是告诉我现在是什么状态
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那我自己看K线不也能看个差不多
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我要它干什么
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这个问题问得准
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你看K线确实能看到一些东西
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今天是涨了还是跌了
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有没有大的阴线阳线
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但你看不出价格变化的数学特征
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均线的斜率到底是多少
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波动率是在放大还是收缩
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当前价格距离长期均值偏离了几个标准差
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这些东西肉眼能大概感觉
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但感觉会骗人
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当你的单子在水下的时候
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你的感觉会让你看什么都像马上要反转了
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指标不会害怕
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也不会贪心
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它往价格上一照
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该设多少度
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就是多少度
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这就是云图和肉眼观天的区别
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你站在地上抬头看
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看见乌云压过来了
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感觉快要下雨了
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但云图告诉你这个云环直径有多大
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中心冷暖气流的强度对比是什么
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你不看云图也能大概判断天气
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但有了云图
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你的判断更稳更细更有依据
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指标给你的就是这种更稳的东西
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所以下次打开行情软件
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不用再追这指标
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问他接下来是涨是跌
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他答不上了
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也别让他打
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你换一个问题
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现在处于什么状态
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趋势方向上多头还是空头
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坡度强度上是在放大还是收敛
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极端边界上
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价格是快到极值了
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还是在中位平稳运行
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把这些问题诊断清楚
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你的交易就有了一个更稳的起点
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至于明天是涨是跌
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那是市场的事
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不归指标管