I know a lot of people on this site use stop losses but how do you set them up with your stock broker?

I'm looking at putting in a trailing stop loss based on the ATR of a stock. Currently I'm with DirectBroking but they only seem to support a fixed stop loss.

Do you manually go in and change the stop loss each day? Or do you export the daily prices to a spreadsheet/trading program and then if the close is below your stop loss (calculated in the spreadsheet) you manually enter a sell?

Neither of these seem ideal.

Bambi