In fact, the ironic part of system design is if you want to maximize profits, you must be willing to give back a great deal of the profits you have already accumulated.
Van K. Tharp

software zone

indicators, oscillators, formulas (1275)

systems (284)

Special offer: buy AmiBroker and EOD+Real-Time Data

Formula Library

	AmiBroker
	MetaTrader
	MetaStock
	TradeStation
	Wealth-Lab
	NinjaTrader

add your formula

System Library

	AmiBroker
	MetaStock
	MetaTrader
	TradeStation
	Wealth-Lab
	NinjaTrader

add your system

Account login

New to s4t? Sign up.
If you forgot your password click here.

Search the Web

Custom Search

Relative Vigor Index

Formula for: TradeStation

Views: 2685

Added: July 20, 2008

Rate this code:

This formula has not been rated yet

email this link

Tags: TradeStation, indicator

Your Ad Here

John Ehlers's article "Relative Vigor Index (RVI)" in this issue includes a version of EasyLanguage code for the indicator. That version includes hardcoded implementations of a symmetrically weighted moving average in three places, and also a hardcoded implementation of two summations. We provide an alternative version below that replaces these hardcoded implementations with function calls. This version produces identical results, except for minor initialization differences.

The SWMA, also known as a triangular moving average, can be conveniently implemented as a double simple moving average, and this code can be separated out into a function that can than be called from the main body of the code as many times as necessary. TradeStation includes a TriAverage function, but the function required here is a little more generalized, so we call it TriAverage_gen and provide the code for it below, following the main indicator code. Summation is another built-in function in TradeStation, and we use that as is.

Type : Function, Name : TriAverage_gen

inputs:
Price( numericseries ),
Length( numericsimple ) ;

variables:
Length1( 0 ),
Length2( 0 ) ;
Length1 = Floor( ( Length + 1 ) * .5 ) ;
Length2 = Ceiling( ( Length + 1 ) * .5 ) ;
TriAverage_gen =
Average( Average( Price, Length1 ), Length2 ) ;

Type : Indicator, Name : Relative Vigor Index

inputs:
Length( 10 ) ;
variables:
Change( 0 ),
MyRange( 0 ),
Num( 0 ),
Den( 0 ),
RVI( 0 ),
RVISig( 0 ) ;
Change = Close - Open ;
MyRange = High - Low ;
Value1 = TriAverage_gen( Change, 4 ) ;
Value2 = TriAverage_gen( MyRange, 4 ) ;
Num = Summation( Value1, Length ) ;
Den = Summation( Value2, Length ) ;
if Den > 0 then
RVI = Num / Den ;
RVISig = TriAverage_gen( RVI, 4 ) ;
Plot1( RVI, "RVI" ) ;
Plot2( RVISig, "Sig" ) ;

This code will also be available for download at www.tradestation2000i.com. Select Support -> EasyLanguage -> Strategies and Indicators -> Traders Tips, and look for the file "RelativeVigorIndex.ELS."
-Ramesh Dhingra
Director, EasyLanguage Consulting
TradeStation Technologies, Inc. (formerly Omega Research, Inc.) a wholly owned subsidiary of TradeStation Group, Inc.
http://www.TradeStation.com

Code:

Type : Function, Name : TriAverage_gen

inputs:
Price( numericseries ),
Length( numericsimple ) ;

variables:
Length1( 0 ),
Length2( 0 ) ;
Length1 = Floor( ( Length + 1 ) * .5 ) ;
Length2 = Ceiling( ( Length + 1 ) * .5 ) ;
TriAverage_gen =
Average( Average( Price, Length1 ), Length2 ) ;

Type : Indicator, Name : Relative Vigor Index

inputs:
Length( 10 ) ;
variables:
Change( 0 ),
MyRange( 0 ),
Num( 0 ),
Den( 0 ),
RVI( 0 ),
RVISig( 0 ) ;
Change = Close - Open ;
MyRange = High - Low ;
Value1 = TriAverage_gen( Change, 4 ) ;
Value2 = TriAverage_gen( MyRange, 4 ) ;
Num = Summation( Value1, Length ) ;
Den = Summation( Value2, Length ) ;
if Den > 0 then
RVI = Num / Den ;
RVISig = TriAverage_gen( RVI, 4 ) ;
Plot1( RVI, "RVI" ) ;
Plot2( RVISig, "Sig" ) ;

Author: John Ehlers
Source: http://www.traders.com

View similar (indicator for TradeStation):

Pivot Bar

RAVI

Seasonal SB

ZigZag

eKam CCI

Moving Averages with Resistance and Support

Trend Continuation Factor

Regularization

Point of Balance Oscillator

Instantaneous Trend Line
...

all formulas for TradeStation

all formulas

Email to friend

Top

However we try to maintain hiqhest possible level of service - most formulas, oscillators, indicators
and systems are submitted by anonymous users.
Therefore S4T™ does not take any responsibility for it's quality.
If you use any of this information, use it at your own risk. You are responsible for your own trading decisions.
Be sure to verify that any information you see on these pages is correct, and is applicable to your particular trade.
In no case will S4T™ be responsible for your trading gains or losses.