Ultimate Algorithmic Trading System

or program any trading idea. Practice makes perfect, so don’t just stop after you
have programmed your initial trading idea—keep going because I guarantee your
creativity won’t stop.
■ Summary
The objective of this chapter was to introduce the fundamentals necessary to take
a trading idea and program it in EasyLanguage. Along the way we discussed data
types, expressions, and statements. EL requires all variables to be declared before
use and we reviewed how this is done. The use of inputs, built-in function calls,
and how to verify your code was explained as well. The EL Editor is a very
powerful tool and is the center of your creativity. TradeStation and its programming
language, EasyLanguage, provides a very tightly integrated trading environment that
can facilitate the programming of any trading idea. Learning this powerful language
is best accomplished by examining as much code as you can. I have used EL for 25
years and I am still learning.
I will leave you with the finite state machine (FSM) code from Chapter 1.
224
AN INTRODUCTION TO EASYLANGUAGE
{Finite State Machine
Pivot Point Example from Chapter 1.
The switch case structure is used in place of
if-then constructs. This increases the readability
considerably.}
vars:state(0),maxRsi(0),state1BarCount(0),state1Price(0),
state3Price(0),state1BarNumber(0);
vars: isHiPivot(false);
isHiPivot = h[1] > h and h[1] > h[2];
Switch(state)
begin
case(0):
begin
if isHiPivot then
begin
state = 1;
state1Price = h[1];
state1BarNumber = barNumber;
print(date," State 1 : ",state1Price,
" ",state1BarNumber);
value1 = text_new(date[2],time,h+20,"S1");;
end;
end;
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