How to create a Renko chart in Excel

# How to create a Renko chart in Excel

**AUTHOR: JASON MORRELL **

I was recently asked how to create a Renko chart in Excel.

My first question was "What the heck is a Renko chart?" which was quickly answered by the guys at **Investopedia**. To paraphrase:

"**Renko charts** were developed by the Japanese to **only show price movements, up or down, that are above a certain amount** in contrast to standard charts that shows **price **on one axis and **fixed t****ime increments **on the other.

Renko (or 'Renga') means **brick **and the chart looks like a series of bricks. A new brick is created when the price moves a specified price amount. This interval is called the '**box size'**. An up brick is typically colored white or green, while a down brick is typically colored black or red."

So I gave it a crack and this is the chart I came up with:

In this post I explain how I set up the data and how I created this Renko chart. For some reason, I keep calling it a Jenga chart, so if a 'Jenga' accidently slips in, let me know in the comments!

All right, let's get into it.

## Step 1: Have your stock data ready

Here is some example stock data. Unlike a regular stock chart, the **open**, **high **and **low **figures are not required, so the only data used is the **Date** and the **Close** price.

## Step 2: Get your chart data ready

The 'box size' is key. It defines the size of each up or down block. For flexibility, write the box size value into cell H1 and name the cell **Box_Size**.

Next, create all the calculation columns required for the Renko chart. These formulas are broken down below.

Notice how the values in column I increase or decrease by exactly 1 (the box size) whenever the close price in column E changes by at least the box size.

**Column F - **Identify the close prices that have moved (up or down) by at least the box size

###### =IF(ABS(E5-INDIRECT("F" & MAX(($F$4:INDIRECT("F" & ROW()-1) <> "") * ROW($F$4:INDIRECT("F" & ROW()-1))))) >= Box_Size, E5, "")

**What the formula does::**

If the difference between the value in column E and the last populated value in column F is equal or greater than the box size then record the close price, otherwise make the cell blank.

**How the formula works:**

###### ($F$4:INDIRECT("F" & ROW()-1) <> "")

This part of the formula constructs an array of '1's and '0's. Each cell between F4 and the cell above the current one is checked. A '1' is added to the array if the cell is populated and a '0' is added to the array if the cell is empty.

For example, for cells **F5:F10**, the array is **{0, 1, 1, 1, 0, 0}**

###### ROW($F$4:INDIRECT("F" & ROW()-1))

This part of the formula constructs an array of row numbers for the range between F4 and the cell above the current cell.

For example, for cells **F5:F10**, the array is **{5, 6, 7, 8, 9, 10}**

###### MAX([Value in 1st array] * [Corresponding value in 2nd array])

This part of the formula multiplies the corresponding values of each array , then selects the largest.

For example, for cell **F11**, multiplying the corresponding values in the 2 arrays **{0x5, 1x6, 1x7, 1x8, 0x9, 0x10}** gives **{0, 6, 7, 8, 0, 0}**. Therefore **8** is the largest value which means that row 8 is the last populated cell to this point.

###### INDIRECT("F" & [Row number of last populated cell])

This part of the formula creates the cell reference for the last populated cell using the row number calculated in the previous step.

###### ABS(E5-[Value in the cell calculated in last step])

This part of the formula subtracts the value in the last populated cell (identified above) from the close price on the current row. If the result is negative, the sign is removed because it's the difference that is important.

###### =IF([The Difference] >= Box_Size, E5, "")

If the difference is equal or greater than the box size, record the close price otherwise make the cell blank.

**Column G - **How big was the increase or decrease?

###### =IF(F5="", "", E5 - INDIRECT("F" & MAX(($F$4:INDIRECT("F" & ROW()-1) <> "") * ROW($F$4:INDIRECT("F" & ROW()-1)))))

Using the same logic as column F, show the amount of the increase or decrease but only if the difference is equal or greater than the box size.

**Column H - **Include the date on the chart if there was a sufficient increase or decrease

###### =IF(F5="", "", A5)

**Column I - **Increase or decrease the stock value by the box size. Ignore the actual increase or decrease value

###### =IF(G5="","",IF(G5>0,INDIRECT("I" & MAX(($I$4:INDIRECT("I" & ROW()-1) <> "") * ROW($I$4:INDIRECT("I" & ROW()-1)))) + Box_Size, INDIRECT("I" & MAX(($I$4:INDIRECT("I" & ROW()-1)<>"") * ROW($I$4:INDIRECT("I" & ROW()-1)))) - Box_Size))

If the figure in column G is positive and not blank then find the last populated closing price in column I and **add **the box price. For example, in cell I6 the last populated closing price is $74.77 in cell I4, therefore I6 is $75.77. For negative figures in column G, the box price is **d****educted **from the last populated closing price.

**Column J - **If there was a sufficient change upwards, place the box-size value here as the increase value on the chart

###### =IF(AND(G5<>"", G5>0), Box_Size, "")

If the figure in column G is positive and not blank, put the box size in column I.

**Column K - **If there was a sufficient change downwards, place the box-size value here as the decrease value on the chart

###### =IF(AND(G5<>"", G5<0), Box_Size, "")

If the figure in column G is **negative and not blank**, put the box size in column J.

## Step 3: Create a stacked column chart and set chart properties

**Step 3a: Create the initial chart**

1. Select the chart data (cells H4:K45).

2. Click the **Insert **tab, click the **Column Chart** icon, then the **Stacked Column** icon.

3. Right-click anywhere on the chart and choose **Select Data**.

4. In the **Select Data Source** dialog click on the default entry in the **Legend Entries (Series)** box, then click the**Remove **button. This provides a clean start.

5. Click the **Add **button under **Legend Entries** to open the **Edit Series** dialog.

6. Click in the **Series Name** box, then click cell **I3 **(**Chart Close Value** heading).

7. Click in the **Series Values **box, delete the current entry then select range **I4:I45**** **(**Chart Close Value** data).

8. Click the **Add **button under **Legend Entries** to open the **Edit Series** dialog.

9. Click in the **Series Name** box, then click cell **J****3 **(**Increase** heading).

10. Click in the **Series Values **box, delete the current entry then select range **J****4:J45**** **(**Increase** data).

11. Click the **Add **button under **Legend Entries** to open the **Edit Series** dialog.

12. Click in the **Series Name** box, then click cell **K****3 **(**Decrease** heading).

13. Click in the **Series Values **box, delete the current entry then select range **K****4:K45**** **(**Decrease** data).

14. Click the **Add **button under **Horizontal (Category) Axis Labels** to open the **Axis Labels** dialog.

16. Click in the **Axis Label Range **box, delete the current entry then select range **H****4:H45**** **(**Dates**).

The **Select Data Source** dialog should now look like this:

17. Click **OK**.

The initial chart should look like this:

### Step 3b: Modify the chart properties

**Change the axis scale**

1. Right-click on the chart axis and choose **Format Axis** from the context menu.

2. In the sidebar, under **Axis Options**, set the **Minimum **and **Maximum **Bounds.

**Remove the gaps between the columns and make the base bars invisible**

3. Left-click any of the (blue) bottom bars. All the bottom bars will be selected.

4. Right-click any bottom bar and choose **Format Data Series** from the context menu.

5. Click the **Series Options** icon (looks like column chart) then set the **Gap Width** to **0%**.

6. Click the **Fill** icon (looks like a paint bucket) then choose **No Fill**.

**Set the up and down bar colours**

7. On the chart, left-click any **UP** bar to select them all.

8. On the sidebar, which should still be showing the **Series Options,** set the **Fill** colour to **green** or **white**

9. On the chart, left-click any **DOWN **bar to select them all.

10. Set the **Fill** colour to **red **or **black**.

**Change the dates on the bottom axis to text so empty dates can be hidden**

11. Right-click on any date on the bottom axis and choose **Format Axis** from the context menu.

12. Change the **Axis Type** to **Text Axis**.

**Hide empty dates**

13. On the table, click the filter button for the **Date **in column H and untick/uncheck the **(Blanks) **check box.

Once these steps have been completed, your Renko chart will look like this.

**Please feel free to post any questions you have into the comments below. And before you leave this page, I want to give you one quick little action item! **

**ACTION ITEM: Comment below with ONE thing you picked up from this post and share how it has helped, or will help, you. It's good to share your successes because it encourages others and provides an instant boost.**

Enjoy the rest of your day!

About the author

Jason Morrell

Jason loves to simplify the hard stuff, cut the fluff and share what actually works. Things that make a difference. Things that slash hours from your daily work tasks. He runs a software training business in Queensland, Australia, lives on the Gold Coast with his wife and 4 kids and often talks about himself in the third person!

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