Is it possible to have a scan that indicates when prices are crossing yesterdays high ? Thanks in advance

No, there is not a way to create a condition formula for when the current price is crossing through yesterday's high.

You can't mix time frames, so there isn't a way to reference yesterday's high in an intraday formula.

1. create formula:  (-1)*(c >maxh39.39) - (-1)*(c <maxh39.39) on 10 minute chart

2. create condition from chart selecting greater than 0.00 and add to watchlist for cross up,

               less than 0.00 for cross down

1.  create formula (-1)*(c>maxH39.39) - (-1)*(c,maxH39.39) on 10 minute chart

2.  create condition from chart formula selecting greater than 0.00 for cross up

                                                             selecting less than 0.00 for cross down

3.  select add to condition

Thanks Bobje!