Is there a way to plot yesterday's high as a horizontal line on a 1 minute chart?

Is there a way to plot yesterday's high as a horizontal line on a 1 minute chart?

OK.  Thanks.

If I have a list of symbols set up with the same Condition Alert, and I edit the PCF that defines the condition, do the Alerts then reflect the edited PCF?

Is there a convenient way to apply a condition alert to a list or watch list of stocks without manually setting each alert for each stock?

I am currently a Platinum level customer. When I click on the “Your Services” button in the upper right corner of the monitor and then click on the “Services” tab of the “Your Profile” window, I see one option in the monthly add-on services category is “$14.99 for US Realtime Stocks”. I thought the Platinum package came with real time streaming price and volume. Can you explain this? Thanks.