envelopes formula

13:17 Mar 4, 2015
English to Dutch translations [PRO]
Science - Mathematics & Statistics
English term or phrase: envelopes formula
Microsoft geeft de definitie: A financial formula that calculates "envelopes" above and below a moving average using a specified percentage as the shift. The envelopes indicator is used to create signals for buying and selling. You can specify the percentage the formula uses to calculate the envelopes.

iets met 'omhullende'?
Harris Couwenberg
Local time: 15:39

Summary of answers provided
4 +1bandbreedte-formule
Frank van 't Hoog
3tolerantie-interval / intervalschatting
Summary of reference entries provided
Moving average envelopes
Kitty Brussaard



57 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +1

Dit is (ook) technischeanalyse-terminologie. De vertaling voor 'envelope above and below' is 'bandbreedte'.

Frank van 't Hoog
Local time: 15:39
Native speaker of: Native in DutchDutch

Peer comments on this answer (and responses from the answerer)
agree  Ron Willems
22 hrs
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1 hr   confidence: Answerer confidence 3/5Answerer confidence 3/5
tolerantie-interval / intervalschatting

The English is fairly inexact. The "envelopes" are just onder- en bovengrens defined in some unspecified way.

Note added at 1 hr (2015-03-04 14:54:52 GMT)

Not "envelope" in its usual mathematical sense.

Local time: 14:39
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Native speaker of: English
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Reference comments

17 days
Reference: Moving average envelopes

Reference information:
Moving averages (MA) are a popular trading tool. Unfortunately, they are prone to giving false signals in choppy markets. By applying an envelope to the moving average, some of these whipsaw trades can be avoided, and traders can increase their profits. (...)
Moving averages are among the easiest-to-use tools available to market technicians. A simple moving average is calculated by adding the closing prices of a stock over a specified number of time periods, usually days or weeks. As an example, a 10-day simple moving average is calculated by adding the closing prices over the last 10 days and dividing the total by 10. The process is repeated the next day, using only the most recent 10 days of data. The daily values are joined together to create a data series, which can be graphed on a price chart. This technique is used to smooth the data and identify the underlying price trend.
Simple buy signals occur when prices close above the moving average; sell signals occur when prices fall below the moving average.
To limit the number of whipsaw trades, some technicians proposed adding a filter to the moving average. They added lines that were a certain amount above and below the moving average to form envelopes. Trades would only be taken when prices moved through these filter lines, which were called envelopes because they enveloped the original moving average line. The strategy of placing the lines 5% above and below the moving average to form an envelope is illustrated in Figure 2.
In theory, moving-average envelopes work by not showing the buy or sell signal until the trend is established. Analysts reasoned that requiring a close of 5% above the moving average before going long should prevent the rapid whipsaw trades that are prone to losses. In practice, what they did was raise the whipsaw line; as it it turned out, there were just as many whipsaws, but they occurred at different price levels.
Moving-average envelopes offer a useful tool for spotting trends after they develop. More precise tools based on the same idea, like Keltner bands or Bollinger Bands®, are useful for identifying high-probability turning points in short-term trends. All traders can benefit from experimenting with these technical tools.

Note added at 17 dagen (2015-03-21 18:55:29 GMT)

Envelopes zijn banden die op een vaste afstand om een gemiddelde heen liggen. Meestal is die afstand een bepaald percentage van dat gemiddelde. Bij envelopes wordt, anders dan bij de Bollinger Bands, geen rekening gehouden met de volatiliteit. Afhankelijk van de breedte van de Envelop kan een koers die een band van de Envelop raakt worden geïnterpreteerd als trendvolgend of als anti-trend.

Note added at 17 dagen (2015-03-21 19:04:29 GMT)

Er zijn nogal wat indicatoren die gebruik maken van een zogenaamde band of envelop om de koersen. Dit zijn lijnen die de koersen insluiten. Soms lopen deze lijnen parallel aan elkaar, bijvoorbeeld bij het trendkanaal, maar er zijn ook varianten, zoals de bollingerbands die dat niet doen.

Het verschil tussen de bovenste band en de onderste band wordt de bandbreedte genoemd. Ook de term tradingbands komen we nog wel eens tegen voor deze systemen.

Trading Enveloppen
Enveloppen worden gevormd door 2 Moving Averages, waarvan er 1 opwaarts is geschoven en de ander neerwaarts. De mate van het verschuiven wordt bepaald door de volatiliteit van de amrkt, hoe hoger deze is, des te hoger is de verschuiving.
Enveloppen geven de hoogste en laagste bandbreedte aan waarin een prijs zou moeten bewegen. een verkoopsignaal treedt in werking als de koers de bovenste band raakt en omgedraaid: er treedt een koopsignaal in werking op het moment dat de koers de onderste band raakt.

Bovenste band = MA(Slot, N)*[1+X/1000]
Onderste band = MA(Slot, N)*[1-X/1000]
MA — Moving Average
N — Periode
X/1000 — De waarde van de verschuiving tov het gemiddelde (gemeten in pips of basispoints).

Kitty Brussaard
Native speaker of: Native in DutchDutch
PRO pts in category: 4
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