Buy price as a function / vector / argument

General
1

How are the “buy price” and “sell price” denoted as functions in TradeScript?
For eg.: I want to back test the following algorithm.
My buy expression is:
CLOSE>EMA(CLOSE,7) AND
EMA(CLOSE,7)>EMA(CLOSE,21)*1.001
RSI(CLOSE,14)<40
My sell expression is:
Buy price + 0.5% of buy price.
How do I code my sell expression?

2

you can define your sell signal based on buy signal generated like buy using  SET  in tradescript

example

SET A = (CLOSE>EMA(CLOSE,7) AND EMA(CLOSE,7)>EMA(CLOSE,21)*1.001)

A*1.00.5

as logically with respect to tradescript but, % wise can not be define i think