Quote from Alegnus:
In Tradestation, you can hand draw a line on a chart and have an order executed based on price crossing the line you drew. You can enter three lines of different color for entry, stoploss, and profit target. The code is readily available on their forum if you have access to it.
https://www.tradestation.com/Discussions/Topic.aspx?Topic_ID=5863
Good Luck.
And anything that works with TS8 works with Multicharts. For the unitiated, Multicharts is a Tradestation clone...