1. todays price is within 10% of 52 week high.

2. todays closing price is in the top 10% of todays range.

3. formula for stock price - 52 week high greater than 2 times 52 week low.

You could try the following Daily Condition Formula:

C >= .9 * MAXH252

Or the following Weekly Condition Formula:

C >= .9 * MAXH52

You could try the following Daily Condition Formula:

STOC1 >= 90

Understanding Stochastics

You could try the following Daily Condition Formula:

MAXH252 > 2 * MINL252

Or the following Weekly Condition Formula:

MAXH52 > 2 * MINL52

PCF Formula Descriptions
Handy PCF example formulas to help you learn the syntax of PCFs!

Wouldn't the following meet requested condition 2 better?

C >= ((H - L) * .9) + L

You might want to read through the referenced topic as your version is exactly the same thing only longer.

It will certainly work just as well, but it isn't better or worse (other than the built in Stochastic function being a bit more efficient to both write and calculate).

How do I identify only the top 20 stocks within 10% of last 24 wwk high?

You can determine if a stock is within 10% of its 24-Week High by using the following Weekly Condition Formula:

C >= .9 * MAXH24

I'm not sure what would constitute the "top 20 stocks", but if it is by how close they are to their 24-Week High, you could use the following Weekly Indicator Formula as WatchList Column and sort:

100 * (C / MAXH24 - 1)

It is the percentage that the current price is below the 24-bar high.

Adding & Editing WatchList Columns