Shading an area chart with different colors for up & down movements [case study]

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We all know that area charts are great for understanding how a list of values have changed over time. Today, let’s learn how to create an area chart that shows different colors for upward & downward movements.

The inspiration for this came from a recent chart published in Wall Street Journal about Chinese stock markets (shown below).

wsj-chinese-stock-market-chart

We will try to create a similar chart using Excel.

This is what we are going to come up with.

indian-stock-market-chart

Looks interesting? Read on…

Creating an area chart with different colors for up & down slopes

Step 1. Gather the data

For our example, let’s use Indian stock market data for last 10 years. Specifically, BSE Sensex weekly closing prices between 1-July-2005 and 27-July-2015.

raw-data-shaded-area-chart

There are 3 columns in this data – Date, Closing price & Volume, as shown below. Let’s say all of this data is in a tabled named data that starts at cell B6.

Step 2. Find out when to switch colors

The next step is to find out when to switch colors.

We can add 3 additional columns to our data to spot the switches, and split data to Advances & Declines accordingly.

Here is what we get.

calculations-explained-shading-area-chart-by-direction

Detecting when a switch occurs:

When looking at closing price for a day, we need to know if the line direction has changed or not. To detect this, we can use a formula like this:

Assuming the closing price we are looking at is in cell C7,

=C7<>MEDIAN(C6:C8) will tell us if the value in C7 is switching the trend or not.

Why does this formula work? Think again. For more on this technique, refer to BETWEEN Formula in Excel.

Step 3. Expanding the data so that we can create an area chart

If we create an area chart with just the data from above step (only advances & declines columns), we end up with a chart that looks like this.

area-chart-with-different-colors-for-up-and-down-slopes

As you can see, the green & red areas (advancing & declining data) have tiny white space between them.

This is because, when we switch from green to red, the green series goes from peak to 0 and simultaneously, red series goes from 0 to peak, creating an effect like below (chart made from sub-set of data)

area-chart-with-different-shades-wrong

To create correct shading effect, we need to expand the data so that on dates when switching happens, there is a duplicate row.

See below illustration to understand what we need.

expaned-data-explained

Writing formulas to expand data

We can use simple arithmetic along with healthy dose of INDEX formulas to create expanded data set. Can you figure out the formulas yourself as homework?

Please examine the downloadable workbook to understand these formulas more.

After expanding the data, the same area chart looks like this:

area-chart-with-different-shades-correct

Step 4. Create area chart from expanded dataset

Select the expanded advances & declines columns and create an area chart from them. Make sure horizontal axis labels are pointing to the expanded date column we constructed in step 3.

Your chart is ready now.

We can add few more bells and whistles to it and come up with below output.

indian-stock-market-chart

Download Area Chart with different colors for up & down slopes workbook

Please click here to download area chart with different colors workbook. Play with the chart & formulas to learn more.

How do you like area chart with different shades?

I think this is a powerful technique to quickly eye-ball data and see where directional changes are occurring, what patterns (if any) are they following etc.

If you observe carefully, our Excel version and WSJ’s charts differ in one key aspect. In WSJ chart, they are shading bull & bear markets where overall trend is upwards or downwards with minor changes during the market period. What formula / approach changes do you think are necessary to make exact replica of WSJ chart in Excel?

Also, do share your feedback about this chart and how you are planning to reuse the concepts at your work.

Addendum – Moving average based smoothing of trends

We can use simple moving averages to smooth the trends so that we can spot upward / downward movements better.
Here is an example chart.

shading-area-chart-with-up-and-down-colors-moving-average-smoothing

You may download this workbook to examine the formulas & chart.

Charts to show change over time

Understanding change is a key component of any analysis. Check out below charting techniques & tutorials to learn few more valuable skills.

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35 Responses to “Quick and easy Gantt chart using Excel [templates]”

  1. "Please share your experiences and ideas using comments"

    For those willing to go VBA, XL can do far more w/Gantt Charts. Compare to PapaGantt. https://sites.google.com/site/beyondexcel/project-updates/papagantt-thebigdaddyofxlganttcharts

    While making PapaGantt was neither quick nor easy, using PapaGantt is both, not just for displaying Gantts, but for scheduling tasks as well.

  2. Stef@n says:

    is it possible to get a xls(m) file ?
    instead of a zip-file with .xml-files ?
    i cannot open it with excel :/
    Regards
    Stef@n

  3. Darren "AusSteelMan" says:

    Thanks very much for this workbook idea.

    To slightly up-scale functionality I added:
    1. conditional format for when the cell value =2 to be red which could be used for critical path or other activity highlighting needs (milestones perhaps)
    2. conditional format for when the cell value =c to be green which could be used for showing activity progress
    3. conditional format for the same range where formula =DATE(YEAR(D$5),MONTH(D$5),DAY(D$5))=TODAY() and set custom to ;;; and cell fill colour to a light blue. This will highlight today down the whole table to allow quick assessment of activity progress to plan. Anything not green upto where the date indicator is shows activity is behind the plan. Opposite for tasks ahead of the plan.
    (There is probably a better way to get the same result but this works for now. If there is please post for us to share.)

    Hope this made enough sense.

    Also, thanks Craig for the link. I'll have a better look soon.

    Regards,
    Darren

  4. Hey Chandoo,

    I actually made one of these for a friend of mine but added an extra level of automation.

    Rather than putting in 1 on all the dates the activity occurs, I added a column for start and end date of each project. Then I used formula along the lines of :

    =IF(AND(DateAtTop >= Start Date, DateAtTop <= End Date),1,"")

    Then used the same conditional formatting where 1 was coloured.

    I thought this was a nice touch, especially if a project lasts for many days.

    Let me know what you think 😉

    Lucas

    P.S. First time I've posted here, love your work btw!

  5. […] via Quick and easy Gantt chart using Excel [templates]. […]

  6. Prahlad Gorur says:

    Excellent, thanks for this tip and expample.
    I had a monthly reporting template very similar to this, but was done in excel which needed more manual inputs.
    I used your exmaple and updated my monthly group reporting plan.
    I further devided the day into 4 quarters to make it easy for us to followup on different tasks.
    Now, I just have to update the start date, and everything gets udpated by itself in fraction of a second.
    Thanks once again. love your daily udpates.

  7. Prajay Kumar says:

    Hi Chandoo,

    Can you guide on preparing an indian version of the captioned sheet. We have saturdays working :-(, and only one day weekly off on sunday.

    Regards-Prajay

  8. Hi Chandoo,very useful post.i need gantt chart for inventory module.

  9. […] Quick and easy Gantt chart using Excel […]

  10. Maria says:

    Hi.

    Really usefull post. I would like to know if i can also include weekends.

    Thank you

  11. Shafeeq says:

    Hi Chandoo, thank you for the great job, I was wondering if you can customize this sheet for Inventory planning purposes?!

    thank you indeed

  12. Leyum says:

    This was so helpful. ive been through about 10 different tutorial type things and this has to be the best so far, helped me out a great deal. and now my boss is happy i can make gantt charts!

    thanks

  13. David says:

    This's a great post, thanks for sharing

  14. Steven says:

    Hi Chandoo,

    Thanks for the excel tutorial. I wanted to make a simple modification, however it will cause issues with the duration part. I created another rule/cell marked 2. For my project I want to show a projected timeline and then an actual timeline. The issue is that the duration is being logged for when I enter 2, which I want to be projected and not actual. Will you please assist in letting me know how I can create a duration for both project and actual on the same line?

    Thank you,
    Steven

  15. Joe says:

    Showing vertical line between every week is very useful for me, I used to do it manually. Thanks so much!!

    But how about, my gantt chart included Saturday & Sunday, and I want to show the vertical line after Sunday, could any expert teach me how to fix it. Thanks again.

  16. Helen N says:

    This was so helpful - thank you! I had a bit of trouble with the end of the week conditional formatting over-writing the filled cells but switching the order of the rules sorted it out. Needed to put together a gantt chart quickly for an important bid at short notice and this was just the job - thanks for taking the time to post it. Much appreciated.

  17. Alina says:

    This is the first time I'm reading a tutorial that actually makes sense 🙂 This is absolutely great, with only one minor issue I can't seem to figure out on my own. How do I include weekends in (or instead of) the Workday formula? Thank you!

  18. […] This template I made myself but I inspired from Chandoo.org. […]

  19. Harrison says:

    Hi,

    Sometimes I must work at weekends - it is possible to modify the dates so that you can include Sat + Sun as well?

    Thanks,
    H

  20. Stuart says:

    Nice gantt chart template chandoo, simple but useful

  21. Kirstin says:

    Thank you so much for this excellent guide! I have adapted this to show scheduled activities at multiple project sites weekly over the course of the year, including active and proposed work. With just a tiny bit of tweaking to your tutorial, I was able to create a chart that suited my needs perfectly!

  22. Somnath says:

    Thank you very much for idea sharing .very innovative workday formula is showing 5 days but i want 6 days , is there any other option plz reply..

  23. Somnath says:

    i got it friends..

    =WORKDAY.INTL(F4,1,11)

    hhhhhh

  24. Cynthia says:

    Hi thanks a lot for the tuto!! It helped me a lot!!
    But can you tell me how can I add a vertical line representing today on it?

    • Hui... says:

      @Cynthia

      Open the template
      Select D7:DS26
      Goto Conditional formatting
      New Rule
      Use a Formula
      =D$5=today()
      then set the format as a Red Right Hand Border only
      Apply
      Do not select stop here for the rule

  25. Muriel says:

    Hi Chandoo,

    I purchased your Project Management templates a month ago and have not had the chance to thank you for the great templates. Thank you!!!!! It has saved me a lot of time creating and re creating templates. Unfortunately, I had to do a lot of customization but it's not that bad. I am now in the process of customizing my GANTT which my boss thinks is too granular. He doesn't want to see a weekly grant. Only the months should be showing. I have researched and researched but to no avail. Do you have any examples I can look at?

  26. Nadine says:

    Hi Chandoo,
    thanks so much for all your tips on Gantt Table.
    I'm actually building one at the moment and want to use the conditional formatting. However, I always get into trouble with that when I have to add new lines. I don't know the final size of my table yet and I eventually also want other people to be able to work with it.
    Conditional formatting tends to "split up" into various "applies to" ranges when you insert a new row or copy and past values from somewhere.
    I'm sure you've come across this issue already... So far I couldn't find a feasible solution to this. I was wondering if you had an idea / suggestion for me?

    Thanks so much!!!
    Nadine

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