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).
We will try to create a similar chart using Excel.
This is what we are going to come up with.
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.
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.
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.
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)
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.
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:
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.
- The volume chart at the bottom is a sparkline
- We can find longest bull & bear rallies using longest winning streak formula
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.
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.
- Narrating the story of change – Case study on how fast America changes its mind
- Advances vs. Declines chart
- How tax burden has changed over years – interactive Excel chart
- Use indexed charts when analyzing change over time
- Never show simple numbers in your dashboards
- Comparing with benchmarks – shading under / over achievement
62 Responses to “Introduction to Financial Modeling using Excel [Part 1 of 6]”
Oooh! Chandoo - are you looking to outperform the Altman Z-Score?
I'm all ears 😉
Many thanks, Paramdeep. Looking forward to the remaining parts of the series
Thank you Paramdeep. I look forward to following the series.
Those interested in Financial Modelling may also find this site interesting:
http://www.fimodo.com/
Hi Chandoo,
Really looking forward for this awesome financial modeling journey 🙂
All the very best..
Regards
Rohit1409
Hi Chandoo,
it seems the future is not away when we will have a new software/spreadsheet as competitor to Microsoft Office/Linux etc.......Hats Off to you..
KEEP SMILING
GURU
@apex, clarity: Thanks...
@all: I do hope that you have started creating the model for the simple case given.. Lets see, what according to you all is the best way forward. So your views on the best practices for the template for valuation?
The planning process varies depending on the project and type of data I am looking at.
If I am doing a cost impact study based on actuals, verses a cost impact study to estimate future cost, verses reviewing historical data then creating a model, verse having to review historical data, apply it to a draft model, update the model based on the draft outputs and the presentation then sometimes repeat the process a few times.
Revisions are an absolutely necessary part of corporate financial modeling especially for the presentation sections. A good presentation will be revised multiple time. There are just to many elements which cannot be planned for, especially with ad hoc reports/models.
Revisions are leading cause of errors, and time spent tracking down errors. The more complex the model the more important revision control is. I would be interested in a section on revision control and good methodologies to determine the effect of changes on models. That is without having to due detail review of the whole model over again.
Hi Paramdeep,
I can't wait for the continuation of this series. You have done a great job in making technical terms appear simple and easy to understand. This article is also very useful in our line of business, in fact i will be featuring this article in our site. Of course the credits will go out to you.
Many thanks and keep it up!
Drew
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@Drew: Thanks! Hope that you found the tutorials useful. Feel free to get back with any queries.
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Great information, i also want to learn financial modeling, how to learn
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chando bhai i m tired for looking financial modeling detail but i cant find it anyway. so plz kindly send me full detail of financial modeling from beginning levelo to final. where i learn complete modeling procedure n order to become professional
You noob, you won`t become a professional like that, you need to do it on your own and learn as you go
@Nadeem Bhai,
The 6 links to the tutorial at the top of this post, build a small integrated financial model step by step. We are also running a complete 8 weeks course on financial modeling (similar to excel school). But that is almost 50% complete right now. If you want to join, you can join the next batch (probably starting in Jan/ Feb)
Feel free to get back, if you have any queries regarding the model/ steps in creating the same
[...] you do not wish to join our course, we are still cool. Here is a 6 part training on financial modeling & 2 part training on project finance. They are free, fresh and [...]
I want to learn how to build a financial model
Dear Lulama,
You can use this tutorial to learn to build a financial model. We also run a course on financial modeling and project finance modeling. The details can be obtained from:
http://chandoo.org/wp/financial-modeling/
You can consider joining that as well.
I would strongly encourage you to join the newsletter to get the updates about financial modeling and the next batch starting for the course.
I want to learn thorough excel and financial modelling thing !!! I am a chartered accountant..CAn you please suggest a detail syllabus that should be learn by me. Also suggest any classes that would cover everything in excel and financial modelling related things.. I stay in mumbai, so please suggest a class in mumbai or any books..byyee.. thanks ..
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Hi Vivek,
We do conduct the financial modeling course online as well as in Mumbai. We start with the basics of excel and build a completely integrated financial model in the class. For details you can look at:
http://chandoo.org/wp/financial-modeling/
or
http://www.edupristine.com/courses/financial-modeling/prisitne-fm-offering
Please describe to me various type of financial modela and demonstrate how a model can be build.
Regards,
Dear Immanuel,
This series of articles does exactly that. If you go step by step through the articles and create the excel sheets on your own, you will understand how to create an integrated financial model.
Alternatively, if you are looking for video sessions, you can consider joining our course:
http://chandoo.org/wp/financial-modeling/
It is expected to reopen somewhere in mid july.
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Thanks Paramdeep this is great!
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Paramdeep Hi! A bit ignorant here, but let's ask anyway. Can I access "recorded" video sessions apart from following the step by step articles?
Thanks!
@Marius: Yes, we do have a training program with recorded video sessions. If you are interested, you can enroll for the same. The details can be obtained from: http://chandoo.org/wp/financial-modeling/
i want to know about the scope of financial modeling.i also want to know after doing financial modeling course what are the job prospect, like where i can found job so plz send me full detail of financial modeling from beginning levelo to final.
I am interested to join your Financial modelling class cos am involved in a new business. But I have a Macbook Air with Excel for Mac installed. Would that work with your program?
Dear Charsiew,
The complete training program is built using Excel 2007 with MS windows. Though there is nothing specific to Microsoft in the training. I think a few people have joined the program and are using MAC. If you write an email to me on paramdeep @ gmail.com, I can send you the email ids of those participants and you can get to know their feedback and difficulties in using the program.
This is great, when does the next batch start?
Dear Karan,
The course is in recorded format and you can register for the same as soon as you want.
Paramdeep, thanks. I'm venturing into financial modelling for the first time and from the little I've read from your website already, I'm sure I'll find your resources very useful; thanks once again.
Dear Seun,
I am glad that you are finding the resources to be useful. Feel free to send in comments with your feedback and further questions.
hie ppl...I jst wantd a small favour cn smone help me out in calculating EBITDA, along with its working, from wipros annual report 2011-2012, link - http://www.wipro.com/investors/annual-reports.aspx
...PLZ plz... i am having a submission tommorow.
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Nice article.
In designing Excel Financial Models I design the user interface as friendly as possible and structuring the input variables in the workflow of the client's operations so that they can flow through the impact of the input variables in Excel using buttons and macros and giving the model transparency.
Cheers
Arthur
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Another step to build any financial model is to do a financial analysis beforehand. This normally helps to design and come up with good projections.
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