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Hi all,
Please excuse any typos in this post - currently typing this on a very strange keyboard, on a borderline Net connection, electrical power cuting off every second hour or so, brain in holiday mode. :)
A lot has been posted about variable-input functions lately.
Variable-input functions are just like any other charting tools - their uselfuness depends on their appropriate application. For example, applying an RSI's output to a Stochastic is probably not that helpful - somewhat like using the same basic data in a circular reference fashion.
However, using general & apropriate market conditions (market breadth, CoT data ( http://metastocktools.com/CoT/CoTlist.txt ), correlated markets) to adjust periodicity in a chart's indicator, makes a lot more sense.
If the above is too difficult to implement, one can also use volatility (or other less-correlated data) to adapt chart indicators.
Here are some (free, no DLL) basic adaptive indicators from
http://metastocktools.com/#metastock :
EMA-ATR - ATR volatility-adjusted, dynamic-period EMA with multiple output choice;
EMA-BB - Bollinger Band volatility-adjusted, dynamic-period EMA with multiple output choice;
EMA-cycle - cycle-adaptive EMA - periodicity determined by historical price cycles;
EMA-RSI - RSI volatility-adjusted, dynamic-period EMA with multiple output choice;
EMA trade-adj - self-adjusting EMA, adjusts periodicity to trade frequency - with multiple output choice;
EMA-volatility - price volatility-adjusted, dynamic-period EMA with multiple output choice;
EMA-volume - improved volume-adjusted, dynamic-period EMA with multiple output choice;
Lastly, here is an example of the variable-input functions available from one of the MACDH Divergence kit's DLLs:
MetaStock VarPeriod.dll
=======================
Copyright (c) The Nag Tools, 2001
22 in-built functions with variable period input
ExtFml("VarPeriod.VarAlert", Expression, Period)
Alert function
ExtFml("VarPeriod.VarCMF", Period)
Chaikin Money Flow function
ExtFml("VarPeriod.VarCCIE", Period)
Commodity Chanel Index (Equis) function
ExtFml("VarPeriod.VarCCI", Period)
Commodity Chanel Index (Standard) function
ExtFml("VarPeriod.VarGZLag2", DataArray, Period)
Gaussian ZeroLag 2 function
ExtFml("VarPeriod.VarHhvBars", DataArray, Period)
Highest High Value Bars Ago function
ExtFml("VarPeriod.VarHhv", DataArray, Period)
Highest High Value function
ExtFml("VarPeriod.VarLlvBars", DataArray, Period)
Lowest Low Value Bars Ago function
ExtFml("VarPeriod.VarLlv", DataArray, Period)
Lowest Low Value function
ExtFml("VarPeriod.VarMid", DataArray, Period)
MidPoint function
ExtFml("VarPeriod.VarMo", DataArray, Period)
Momentum function
ExtFml("VarPeriod.VarMov", DataArray, Period, Method)
Moving Average function
S - Simple
W - Weighted
E - Exponential
TRI - Triangular
ExtFml("VarPeriod.VarROC", DataArray, Period, Method)
Rate Of Change function
PER - Percent
PNT - Points
ExtFml("VarPeriod.VarRef", DataArray, Period)
Reference function
ExtFml("VarPeriod.VarRSI", DataArray, Period)
RSI function
ExtFml("VarPeriod.VarStdev", DataArray, Period)
Standard Deviation function
ExtFml("VarPeriod.VarStoD", Period, Slowing)
Stochastic %D function
ExtFml("VarPeriod.VarStoK", Period)
Stochastic %K function
ExtFml("VarPeriod.VarSum", DataArray, Period)
Summation function
ExtFml("VarPeriod.VarTRIX", DataArray, Period)
TRIX function
ExtFml("VarPeriod.VarVar", DataArray, Period)
Variance function
ExtFml("VarPeriod.VarWillR", Period)
Williams' %R function
jose '-)
http://metastocktools.com/MACDH/MACDHdiverg.htm
(available from Sept 2005)
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