Column Titles

ATM wants to do as little calculations as possible. If it has already calculated the RSI(14), it doesn't want to do it again. To work out if a calculation has been done already or not, ATM goes by the Column Title.

You have to provide enough information for your Column Title to be unique amongst all other Columns (yours and everyone else's).

Here's an example with the Simple Moving Average. We could have just used a Column Title of "SMA". Someone uses the SMA(CLOSE, 20) in the trading system. So ATM creates a column and gives it a title of "SMA". But then that person adds another SMA to their trading system - this time SMA(CLOSE, 50). ATM checks to see if the "SMA" column already exists, and it does, so ATM doesn't calculate again. But here, there are actually 2 different SMAs. Let's try again.

This time we change the Column Title to "SMA_Setting01". Now ATM would correctly create 2 Columns - 1 titled "SMA_20", and the other titled "SMA_50". Fixed? No. The person decides they want another SMA in there - this time SMA(HIGH, 20). That would create the Column Title of "SMA_20", which already exists. But SMA(CLOSE, 20) is different to SMA(HIGH, 20). So the correct Column Title to use in this case is "SMA_OHLC_Setting01".

OHLC will get substituted with "CLOSE" or "HIGH", and Setting01 will be substituted with "20" or "50". That gives us 3 different Column Titles: SMA_CLOSE_20, SMA_CLOSE_50, SMA_HIGH_20.

But if the person used SMA(CLOSE, 20) three different times, then the SMA_CLOSE_20 column will only be calculated once.

The message is - your Column Title needs to work out to be unique based on the options available.

Lastly, don't use any of Column01-Column20 in the title.

See also:

• Expressions and Aggregates
• Bars required formula