Syntax
public TTF(Bars ds, int period, string description)
public static TTF Series(Bars ds, int period)
public static double Value(int bar, Bars ds, int period)
Parameter Description
| Bars |
The symbol's Bars object |
| period |
Indicator period
|
Description
Trend Trigger Factor from the December 2004 issue of
Stocks & Commodities magazine.
TTF provides an indication of trend direction by measuring the differences between the highest high and lowest low of the current and previous Periods; arriving at an oscillatory-type indicator whose value exceeds 100 when an uptrend is confirmed and -100 for a downtrend. Using TTF alone for entries and exits will subject a trading system to frequent whipsaws for non-trending markets.
Example
Here's the basic system from the magazine article.
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using WealthLab;
using WealthLab.Indicators;
using TASCIndicators;
namespace WealthLab.Strategies
{
public class MyStrategy : WealthScript
{
protected override void Execute()
{
const int period = 15;
DataSeries ttf = TTF.Series(Bars, period);
ChartPane cp = CreatePane( 40, true, true );
DrawHorzLine(cp, 100, Color.Gray, LineStyle.Dotted, 1);
DrawHorzLine(cp, -100, Color.Gray, LineStyle.Dotted, 1);
PlotSeries(cp, ttf, Color.Blue, LineStyle.Solid, 2);
HideVolume();
for (int bar = period; bar < Bars.Count; bar++)
{
switch ((int)MarketPosition)
{
case 1:
if( CrossUnder(bar, ttf, -100) )
{
SellAtMarket(bar + 1, LastPosition);
ShortAtMarket(bar + 1);
}
break;
case -1:
if( CrossOver(bar, ttf, 100) )
{
CoverAtMarket(bar + 1, LastPosition);
BuyAtMarket(bar + 1);
}
break;
default:
if( CrossOver(bar, ttf, 100) )
BuyAtMarket(bar + 1);
else if( CrossUnder(bar, ttf, -100) )
ShortAtMarket(bar + 1);
break;
}
}
}
}
}