SHI_SilverTrendSig1
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This script is a custom technical analysis tool designed for the MetaTrader platform to help traders identify potential trend reversal points or significant price movements. It functions by scanning historical price data and placing visual signals (arrows) on the chart when specific price action conditions are met.
How the Logic Works
1. Data Analysis and Sensitivity The script examines a specific number of previous price bars (determined by the user). It uses several key variables to decide where to place its signals:
- Period: This defines the "window" of time the script looks at to determine recent highs and lows.
- Distance (Offset): This acts as a sensitivity filter. Instead of triggering a signal the moment a price touches a high or low, it waits for the price to penetrate a certain percentage into that range.
- Dynamic Range Calculation: The tool calculates a unique value based on the volatility of the recent candles. It looks at the difference between the "High" and "Low" prices over a moving window, allowing the signals to adjust themselves based on how much the market is actually moving.
2. Identifying Entry Signals The script continuously monitors the relationship between the current closing price and the highest/lowest points reached during the defined period:
- Sell Signals (Bearish): If the price drops and closes near or below a specific percentage of the recent low range, the script identifies a potential downward trend. It then places a visual marker at the top of that candle.
- Buy Signals (Bullish): Conversely, if the price rises and closes near or above a specific percentage of the recent high range, the script identifies a potential upward trend and places a visual marker at the bottom of that candle.
3. Signal Filtering To prevent the chart from becoming cluttered with constant signals during a strong trend, the script includes "state logic." It is designed to recognize which direction it last signaled; it will generally look for an opposing signal before repeating the same type of arrow. This helps filter out "noise" and focuses the user's attention on significant changes in market direction.
Summary for the User Think of this tool as a "trend watcher." It ignores minor price fluctuations and only reacts when the price moves into extreme areas (the high or low zones) relative to recent history. When the price "breaks" into these zones significantly enough, it alerts you with an arrow, suggesting that the trend may be shifting in that direction.
//+------------------------------------------------------------------+
//| SHI_SilverTrendSig.mq4 |
//| Copyright © 2003, VIAC.RU, OlegVS, GOODMAN, © 2005, Shurka |
//| shforex@narod.ru |
//| |
//| |
//| Ïèøó ïðîãðàììû íà çàêàç |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, Shurka"
#property link "http://shforex.narod.ru"
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Red
#property indicator_color2 Blue
#define SH_BUY 1
#define SH_SELL -1
//---- Âõîäíûå ïàðàìåòðû
extern int AllBars=0;//Äëÿ ñêîëüêè áàðîâ ñ÷èòàòü. 0 - äëÿ âñåõ.
extern int Otstup=30;//Îòñòóï.
extern int Per=9;//Ïåðèîä.
int SH,NB,i,UD;
double R,SHMax,SHMin;
double BufD[];
double BufU[];
//+------------------------------------------------------------------+
//| Ôóíêöèÿ èíèöèàëèçàöèè |
//+------------------------------------------------------------------+
int init()
{
// NB çàïèñûâàåì êîëè÷åñòâî áàðîâ äëÿ êîòîðûõ ñ÷èòàåì èíäèêàòîð
if (Bars<AllBars+Per || AllBars==0) NB=Bars-Per; else NB=AllBars;
IndicatorBuffers(2);
IndicatorShortName("SHI_SilverTrendSig");
SetIndexStyle(0,DRAW_ARROW,0,1);
SetIndexStyle(1,DRAW_ARROW,0,1);
SetIndexArrow(0,159);
SetIndexArrow(1,159);
SetIndexBuffer(0,BufU);
SetIndexBuffer(1,BufD);
SetIndexDrawBegin(0,Bars-NB);//Èíäèêàòîð áóäåòîòîáðàæàòüñÿ òîëüêî äëÿ NB áàðîâ
SetIndexDrawBegin(1,Bars-NB);
ArrayInitialize(BufD,0.0);//Çàáü¸ì îáà áóôåðà íîëèêàìè. Èíà÷å áóäåò ìóñîð ïðè ñìåíå òàéìôðåéìà.
ArrayInitialize(BufU,0.0);
return(0);
}
//+------------------------------------------------------------------+
//| Ôóíêöèÿ äåèíèöèàëèçàöèè |
//+------------------------------------------------------------------+
int deinit()
{
return(0);
}
//+------------------------------------------------------------------+
//| Ñîáñíà èíäèêàòîð |
//+------------------------------------------------------------------+
int start()
{
int CB=IndicatorCounted();
/* Òóò âîò òà ñàìàÿ îïòèìèçàöèîííàÿ ôèøêà.  ÿçûê ââåäåíà ôóíêöèÿ, êîòîðàÿ âîçâðàùàåò êîëè÷åñòâî
ïîñ÷èòàííûõ áàðîâ, ïðè÷¸ì î÷åíü õèòðî. Ïðè ïåðâîì âûçîâå èíäèêàòîðà ýòî 0, âñ¸ ïîíÿòíî, åù¸ íè÷åãî
íå ñ÷èòàëîñü, à çàòåì âûäà¸ò êîëè÷åñòâî îáñ÷èòàííûõ áàðîâ ìèíóñ îäèí. Ò.å. åñëè âñåãî áàðîâ 100,
òî ôóíêöèÿ âåðí¸ò 99. ß ââ¸ë òàêîé êîä, âûøå ó ìåíÿ îïðåäåëÿëàñü NB - êîë-âî áàðîâ ïîäëåæàùèõ
îáñ÷¸òó.  ïðèíöèïå ýòîò ïàðàìåòð ìîæíî è âûêèíóòü, îäíàêî äëÿ òåõ êòî â òàíêå (I80286) ìîæíî
è îñòàâèòü. Òàê âîò, çäåñü, ïðè ïåðâîì âûçîâå NB îñòà¸òñÿ ïðåæíåé, à ïðè ïîñëåäóþùèõ óìåíüøàåòñÿ
äî ïîñëåäíåãî áàðà, ò.å. 1 èëè 2, íó èëè ñêîëüêî òàì îñòàëîñü ïîñ÷èòàòü*/
if(CB<0) return(-1); else if(NB>Bars-CB) NB=Bars-CB;
for (SH=1;SH<NB;SH++)//Ïðî÷¸ñûâàåì ãðàôèê îò 1 äî NB
{
for (R=0,i=SH;i<SH+10;i++) {R+=(10+SH-i)*(High[i]-Low[i]);} R/=55;
SHMax = High[Highest(NULL,0,MODE_HIGH,Per,SH)];
SHMin = Low[Lowest(NULL,0,MODE_LOW,Per,SH)];
if (Close[SH]<SHMin+(SHMax-SHMin)*Otstup/100 && UD!=SH_SELL) { BufD[SH]=High[SH]+R*0.5; UD=SH_SELL; }
if (Close[SH]>SHMax-(SHMax-SHMin)*Otstup/100 && UD!=SH_BUY) { BufU[SH]=Low[SH]-R*0.5; UD=SH_BUY; }
}
return(0);
}
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