# Display different color segments of line chart if it falls below or above a certain threshold **URL:** \ **Category:** 📊 Plotly Python\ **Created:** [November 9, 2020, 10:53pm UTC](https://community.plotly.com/t/display-different-color-segments-of-line-chart-if-it-falls-below-or-above-a-certain-threshold/47011 "2020-11-09T22:53:59Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![lynnette](https://sea2.discourse-cdn.com/flex024/user_avatar/community.plotly.com/lynnette/32/13265_2.png) [@lynnette](https://community.plotly.com/u/lynnette)\ **Post date:** [November 9, 2020, 10:53pm UTC](https://community.plotly.com/t/display-different-color-segments-of-line-chart-if-it-falls-below-or-above-a-certain-threshold/47011/1 "2020-11-09T22:53:59Z")
I have a multi-line graph that displays percent increase over time. I’d like to set a threshold in my code to have an upper and lower bound. If the line falls outside these bounds, I’d like that specific part of the line graph to be a different color than its parent. Here is my code thus far: ``` import plotly.express as px import plotly.graph_objects as go fig = px.line(df14, x = "Date", y = "Percent", color = "POD", title = "POD Growth in Percentage (US)", labels = {"Percent": "Percent Growth"}) fig.update_layout( font_family="Arial", font_color="black", title_font_family="Arial", title_font_color="black", legend_title_font_color="black" #style the text (legend, title etc) ) fig.update_xaxes(title_font_family="Arial") #style ance center title fig.update_layout( title={ 'text': "POD Growth Percentage in US (Line Graph)", 'y':0.9, 'x':0.5, 'xanchor': 'center', 'yanchor': 'top'}) fig.update_traces(mode='markers+lines') #add dots to line fig.show() ``` This is the visual result: ![image](https://us1.discourse-cdn.com/flex024/uploads/plot/original/2X/7/7a9266fad3276612c000979d91552f90c877df0a.png) Let me zoom in on one line to better explain: I would like a threshold set for each POD, and if the line goes above or below this threshold, the color will be different for that part of the line graph. I would like a **threshold set for each POD** , and **if the line goes above or below this threshold, the color will be different for that part of the line** graph. For instance: **The upper bound for POD IAD may be 5 and the lower bound for IAD may be 0.** Any value that is over 5 , or below 0, show be highlighted a specific color. **The upper bound for POD SJC may be 10 and the lower bound for SJC may be 3** Any value that is over 10, or below 3, should be highlighted a specific color. **I am wanting the thresholds to be for each POD** Please see below: ![image](https://us1.discourse-cdn.com/flex024/uploads/plot/original/2X/5/5eb064245142ed1afb56b3aef4b58ea274e6c2ae.png) The highlighted yellow parts of the line reflect where the line graph has exceeded or decreased a set threshold. **Is this possible to do this using Plotly?** Here is the raw data example: ``` POD Start End Diff Percent Date IAD 4/1/2019 5/1/2019 160.4279 11.10809 04-01-2019 to 05-01-2019 IAD 5/1/2019 6/1/2019 136.0248 8.476798 05-01-2019 to 06-01-2019 IAD 6/1/2019 7/1/2019 174.0513 9.998946 06-01-2019 to 07-01-2019 IAD 7/1/2019 8/1/2019 112.0424 5.851551 07-01-2019 to 08-01-2019 IAD 8/1/2019 9/1/2019 141.8488 6.998691 08-01-2019 to 09-01-2019 IAD 9/1/2019 10/1/2019 103.5522 4.774984 09-01-2019 to 10-01-2019 IAD 10/1/2019 11/1/2019 125.6087 5.528085 10-01-2019 to 11-01-2019 IAD 11/1/2019 12/1/2019 145.2591 6.058016 11-01-2019 to 12-01-2019 IAD 12/1/2019 1/1/2020 115.5121 4.542251 12-01-2019 to 01-01-2020 IAD 1/1/2020 2/1/2020 185.7191 6.985673 01-01-2020 to 02-01-2020 IAD 2/1/2020 3/1/2020 126.7386 4.455896 02-01-2020 to 03-01-2020 IAD 3/1/2020 4/1/2020 231.3461 7.786734 03-01-2020 to 04-01-2020 IAD 4/1/2020 5/1/2020 97.02587 3.02981 04-01-2020 to 05-01-2020 IAD 5/1/2020 6/1/2020 42.85235 1.298792 05-01-2020 to 06-01-2020 IAD 6/1/2020 7/1/2020 124.666 3.729997 06-01-2020 to 07-01-2020 IAD 7/1/2020 8/1/2020 357.9974 10.32609 07-01-2020 to 08-01-2020 IAD 8/1/2020 9/1/2020 490.9587 12.8358 08-01-2020 to 09-01-2020 IAD 9/1/2020 10/1/2020 204.5478 4.739428 09-01-2020 to 10-01-2020 IAD 10/1/2020 11/1/2020 287.6025 6.362292 10-01-2020 to 11-01-2020 SJCtest 4/1/2019 5/1/2019 12.38486 5.780551 04-01-2019 to 05-01-2019 SJCtest 5/1/2019 6/1/2019 -2.61735 -1.15487 05-01-2019 to 06-01-2019 SJCtest 6/1/2019 7/1/2019 -5.6187 -2.50814 06-01-2019 to 07-01-2019 SJCtest 7/1/2019 8/1/2019 3.204252 1.467153 07-01-2019 to 08-01-2019 SJCtest 8/1/2019 9/1/2019 -25.3782 -11.4521 08-01-2019 to 09-01-2019 SJCtest 9/1/2019 10/1/2019 -10.9717 -5.59137 09-01-2019 to 10-01-2019 ``` Any suggestions is appreciated