add horizontal bar in bold

[mcbenjemaa]

Hello,

i'm using this library and it's awesome,
i only have a small problem, i wanna add a bold horizontal bar in the Line chart
in my chart.
i have three datasets, and i want to add a horizontal bar not a dataset
this is my chart

for example i need to add my horizontal bar on point 128,
i searched in the docs but i didn't find a way,
so please any help

[etimberg]

Something like https://github.com/chartjs/chartjs-plugin-annotation is what you need but it may not work as it's not currently maintained

[mcbenjemaa]

thank you sir, but i only want to add a trend line which declare the average in the chart to render the chart more interactive and readable,
the trend line should be in Bold and can choose his color

[etimberg]

The way to do this would be to compute the trend-line and use the annotation plugin to draw it. The style of the line can be changed there.