A Market Profile is the arrangement and presentation of market action as a vertically aligned bell curve. Here is an example of a market profile:

 1285.00 M

 1284.75 HM

 1284.50 DEGHM

 1284.25 DEGHM

 1284.00 DEGHM

 1283.75 DEFGHIMN

 1283.50 DEFGHIMN

 1283.25 DEFGHIMN

 1283.00 DEFGHIJKMN

 1282.75 DFGHIJKMN

 1282.50 DFGJKLMN

 1282.25 DJKLMN

 1282.00 DJKLMN

 1281.75 DJKLMN

 1281.50 DLMN

 1281.25 DLMN

 1281.00 LMN

 1280.75 LMN

 1280.50 MN

 

Each series of letters represent a 30 minute time bracket and placing that letter against the price indicates that the market traded at that price during that time bracket.

Compare this against a Volume Profile.