# Using Strings in EL for multi-step System

This little strategy uses EasyLanguage’s string manipulation to keep track of a multi-step, mutli-criteria, multi-state trade entry. You don’t buy until the buyString is equal to “BUY”. The sell side is just the opposite. When you program a multi-step entry you also need to build a reset situation. In the case of this system you reset the string to null(“”) when the price dips back down below the 9 day moving average. After resetting the process starts over again.

``````
{Use curly brackets for mult-line

This system needs three criteria to be met
before a trade is initiated
Buy Criteria 1:  C > 9 day movAvg - trend Up
Buy Criteria 2:  H = HighestHigh 10 days - break Out
Buy Criteria 3:  C < C[2] - retracement }

if marketPosition = 0 then {If flat then reset strings}
begin
sellString = "";
end;

if c >= average(c,9) then buyString = "B";  //First criteria met
if c < average(c,9) then buyString = "";

if c > average(c,9) then sellString = "";
if c <= average(c,9) then sellString = "S";

if buyString = "B" then
begin
if h > highest(h,10)[1] then buyString = buyString + "U"; //Second Criteria met
end;

if buyString = "BU" then
begin
if c < c[2] then buyString = buyString + "Y"; //Third criteria met
end;

if sellString = "S" then
begin
if l > lowest(l,10)[1] then sellString = sellString + "E";
end;

if sellString = "SE" then
begin
if c > c[2] then sellString = sellString + "LL";
end;

if sellSTring = "SELL" then sellShort ("sellString") next bar at open;
setStopLoss(1000);

SetPercentTrailing(1000, 30);  ``````
``` ```

## 4 thoughts on “Using Strings in EL for multi-step System”

1. John says:

Hello,

I purchased your Building Winning Trading Strategies with TradeStation book. Page 29 recommends downloading eh companion code for this book, however, no link is provided…at least not on that page.

John

1. Hello John,

Sorry for the delay. Which edition are you referring. If its the second edition go to :www.wiley.com/go/tradingsystems. Plug in your email and password. If this doesn’t work let me know and I will email the ELD directly.

Best regards,

George

2. Christos Efthymiou says:

Dear Sir,

First of all, thanks for sharing some of your work and thoughts.

I would like to ask why using this method for entry and not just demand that if condition1=TRUE, condition2=TRUE, etc, then buy/sell.

Is there any specific advantage or you are just showing another way?

Kind regards

Christos

1. Hello Christos – you are exactly right I am using Strings as an alternative method. Building the string doesn’t require the conditions to be consecutive. You can definitely use different Condition variables. Thanks for the input.