1. First, import the required data into origin, and you can get the data in the following figure. Click left to select the place indicated by the arrow in step 1 in the figure, and you can add some actual changes on the green edge, including the need for pointers. In this way, the result of the diagram will be obtained, and the trend line can be added to the diagram made by Origin.

2. Next, you can see on the screen that the small picture frame shown in Figure 2 will appear. When you move the small picture frame with the mouse, the data of step 3 will appear on the way, and that's all. This method is also applicable to the marking of infrared image data, and the marked places should be treated emphatically, while the errors should be removed during post-processing.

3. Enter origin8. or 8.5, select the data of "X" and "Y" with the mouse, and move the mouse to Step 1 in the figure to modify the name on the coordinate axis: left click to select the name to be changed, and then right click, and then "Properties ..." will appear.

You can edit it after selecting it, and you can also adjust the color, size, type and font. Next, after the linear fitting dialog box pops up, determine the settings of relevant parameters.

4. Then, click left to select the phenomenon in step 2 in the figure, and proceed with the target selected by the mouse. Then you can continue to add the appropriate analysis → fitting → polynomial → open dialog ... and click OK to successfully join the trend line.

Extended information:

The application of trend line in futures trading:

The breakthrough of trend line is often used to analyze the price trend. This is a new position, or if you are looking for an opportunity to close the original position, then the breakthrough of compact trend line often constitutes a wonderful starting signal.

of course, other technical signals must always be considered. In addition, when the trend line plays a supporting or blocking role, it can also be used as an entry point. Buying on the upper side of the main uptrend line or selling on the lower side of the main downtrend line are all effective countermeasures for timing.

the application of trend line in foreign exchange trading:

firstly, it is absolutely useful for our analysis to make it clear that the trend is a reflection of the exchange rate trend.

secondly, the trend line applies the principle of inertia to represent a changing trend of things in the process of movement, for example, it takes a period of gentle speed to enter the downward situation again in the market.

thirdly, the wave theory.