Sorry, this is probably very simple:  How would I write a pcf that says i'm looking for stocks that are gapping up a minimum of 2% from the prior days close?

C1 < O AND O >= 1.02 * C1

This is what i have but the names its producing often time are below the prior days close.  Thankyou for your help.

Gap up can mean a variety of things (even when specifying "from the close")..

If you mean the open is at least 2% above the prior close than you should already be getting than as part of your formula.

O >= 1.02 * C1

If you need some sort of unfilled gap where the low has never gone below that close.

O >= 1.02 * C1 AND L > C1

If price just needs to also currently be above that close.

O >= 1.02 * C1 AND C > C1

If price needs to be still be at least 2% above the previous close.

O >= 1.02 * C1 AND C >= 1.02 * C1

If the price of the current bar needs to have remained above the previous close the entire time.

L >= 1.02 * C1

If none of these does what you want, please provide additional clarification as to your requiements along with examples of symbols returning true which do not meet those requirements.

Thankyou very much for all the varying ways and ideas....Its very appreciated and helpful Bruce!  Best regards!

You're welcome.