Renko

Renko 

Renko  charts a line (or "brick") is drawn in the direction of the prior move only if prices move by a minimum amount (i.e., the box size). The bricks are always equal in size..

Basic trend reversals are signaled with the emergence of a new white or black brick. A new white brick indicates the beginning of a new up-trend. A new black brick indicates the beginning of a new downtrend. A New Line  is drawn  only when a predetermined amount is exceeded from the top/ bottom. All the bricks are of the same size. More  than one line could be drawn in a single period.

Calculation

Renko charts are always based on closing prices. A  box size specified  determines the minimum price change to display. To draw Renko bricks, current period's close is compared with the high and low of the previous brick (white or black). If the closing price rises above the top of the previous brick by at least the box size, one or more white bricks are drawn in new columns. The height of the bricks is always equal to the box size.

If the closing price falls below the bottom of the previous brick by at least the box size, one or more black bricks are drawn in new columns.. If prices move more than the box size, but not enough to create two bricks, only one brick is drawn.

 Indicators calculated on Renko charts use all the data in each column and then display the average value of the indicator for that column. Renko (Bricks) are drawn equal in size for a determined amount. If prices change by the determined amount or more, a new brick is drawn.

If prices change by less than the determined amount, the new price is ignored. Renko Charts display price movements if they are bigger than a fixed amount. 

The Renko chart is a trend following technique. Renko charts also  gives the  signals near the end of short-lived trends. However, the expectation with a trend following technique is that it allows  to ride the major portion of significant trends.

Since a Renko chart isolates the underlying price trend by filtering out the minor price changes, Renko charts can also be very helpful when determining support and resistance levels. A price level at which it’s  expect selling is  to take place due to technical analysis. The resistance level of one is the support level for the other