# How cross over,cross under,over,under work ?

![](/files/MKE7oqLmxVMmiHOQKFM1)

{% hint style="info" %}
Checking cross over, cross under at candle <mark style="color:yellow;">**x**</mark>:&#x20;

* Take two point at candle <mark style="color:yellow;">**x**</mark> and <mark style="color:yellow;">previous 1 candle of x</mark> in <mark style="color:blue;">blue line</mark> (**b\[x-1],b\[x]**) and two point in <mark style="color:red;">red line</mark> (**r\[x-1],r\[x]**)
* If **b\[x-1] < r\[x-1]** and **b\[x] > r\[x]** => <mark style="color:blue;">blue line</mark> cross over <mark style="color:red;">red line</mark>.
* If **b\[x-1] > r\[x-1]** and **b\[x] < r\[x]** => <mark style="color:blue;">blue line</mark> cross under <mark style="color:red;">red line</mark>.

**Note**: incase condition is <mark style="color:red;">Price cross over/cross under....</mark> if you select price to check:

* **C-C**: take two point <mark style="color:red;">close</mark> of candle <mark style="color:yellow;">x</mark> and <mark style="color:red;">close</mark> of previous 1 candle of <mark style="color:yellow;">x</mark> **(c\[x],c\[x-1])**
* **O-C**: take two point <mark style="color:red;">open and close</mark> of candle <mark style="color:yellow;">x</mark> **(o\[x],c\[x])**
* **H-L**: take two point <mark style="color:red;">high and low</mark> of candle <mark style="color:yellow;">x</mark> **(h\[x],l\[x])**
  {% endhint %}

{% hint style="info" %}
Checking over, under at candle <mark style="color:yellow;">**x**</mark>:&#x20;

* Take one point at candle <mark style="color:yellow;">**x**</mark> in <mark style="color:blue;">blue line</mark> (**b\[x]**) and one point in <mark style="color:red;">red line</mark> (**r\[x]**)
* If **b\[x] > r\[x]** => <mark style="color:blue;">blue line</mark> over <mark style="color:red;">red line</mark>.
* If **b\[x] < r\[x]** => <mark style="color:blue;">blue line</mark> under <mark style="color:red;">red line</mark>.
  {% endhint %}

![](/files/0azSYu0VkOW8xkEd3FPy)

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