Pulling Market Data by Time Using Bar Index Function

You can use LocalHour and LocalMinute functions in the RTD formula to pull in the open price for a market using a 5-minute bar at 12:00. This technique was detailed in a previous article here.

If you are pulling in a large amount of data using the above functions, then it can create a heavy load on CQG and Excel. A better way is to use the Bar Index function. There is a study you can add to a chart called Bar Index (BarIdx). This study simply counts the number of bars based on one of the following choices:

  • Start of Day = number of bars since the start of trading day
  • End of Day = number of bars left in trading day
  • Start of Session = number of bars since start of session
  • End of Session = number of bars left in session

The output is BarIx. We can use this in an RTD formula:

=RTD("cqg.rtd",,"StudyData", "Open(EP) when Barix(EP,reference:=StartOfSession)=42", "Bar", "", "Open","5","0","PrimaryOnly",,,"False","T","EveryTick")

If I add the BarIdx study to a 5-minute chart of the E-mini S&P futures contract (Symbol EP) set to the Primary Session, I will see that the index value of 42 is the 12:00 bar. Therefore, the above RTD formula gives me the open of the 12:00 5-minute bar for the E-mini S&P futures contract. If the current time is before 12:00, then the RTD formula pulls the previous session's 12:00 open. We can force it to be blank by including a date. If today is the 21st, then the cell is blank until 12:00 today.

=RTD("cqg.rtd",,"StudyData", "Open(EP) when LocalDay(EP)=21 and Barix(EP,reference:=StartOfSession)=42", "Bar", "", "Open","5","0","All",,,"False","T","EveryTick")

The above formulas also enable you to pull in the open at 12:00 for a day earlier in the month, such as the 6th by replacing 21 with 6.

You can also pull in a study value using the BarIx function. For example, here is the RTD formula to pull in a 21-period simple moving average using the primary session on the 20th.

=RTD("cqg.rtd",,"StudyData","MA(EP,MAType:=Sim,Period:=21,InputChoice:=Close) When LocalDay(EP)=20 and Barix(EP,reference:=StartOfSession)=42","Bar","","Close","5","0","PrimaryOnly",,,"False","T","EveryTick")

A simple sample Excel file is provided.

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Trading and investment carry a high level of risk, and CQG, Inc. does not make any recommendations for buying or selling any financial instruments. We offer educational information on ways to use our sophisticated CQG trading tools, but it is up to our customers and other readers to make their own trading and investment decisions or to consult with a registered investment advisor. The opinions expressed here are solely those of the author and do not reflect the opinions of CQG, Inc. or its affiliates.