This is a trading item or a component that was created using QuantShare by one of our members.
This item can be downloaded and used by QuantShare Trading Software.
Trading items are of different types. There are data downloaders, trading indicators, trading systems, watchlists, composites/indices...
You can use this item and hundreds of others for free by downloading QuantShare.
Top Reasons Why You Should Use QuantShare:
Works with US and international markets (stock, forex, options, futures, ETF...)
Offers you the tools that will help you become a profitable trader
Allows you to implement any trading ideas
Exchange items and ideas with other QuantShare users
Our support team is very responsive and will answer any of your questions
We will implement any features you suggest
Very low price and much more features than the majority of other trading software
The Efficiency Ratio (ER) was initially described by Perry Kaufman in his book Smarter Trading. This same indicator also became known as Fractal Efficiency.
This ratio measure the efficiency of a trend by dividing the net price movement over a certain time period by the sum of the absolute values of the individual moves.
The value of the ER ranges between 0 and 1. It has the value of 1 when prices move in the same direction for the full time over which the indicator is calculated, e.g. n bars period. It has a value of 0 when prices are unchanged over the n periods. When prices move in wide swings within the interval, the sum of the denominator becomes very large compared to the numerator and ER approaches zero.
Some uses for ER:
- A qualifier for a trend following trade; a trend is considered "persistent" only when RE is above a certain value, e.g. 0.3 or 0.4 .
- A filter to screen out choppy stocks, where breakouts are frequently "fakeouts".
- In an adaptive trading system, helping to determine whether to apply a trend following algorithm or a mean reversion algorithm.
- It is used in the calculation of Kaufman's Adaptive Moving Average (KAMA).
In this implementation (indicator name S_Efficiency_Ratio() ) I have used Kaufman's formula where the ratio has the absolute value of the period price movement in the numerator, and it indicates only the efficiency, not the direction. Some other implementations do not use the absolute value, and the indicator value will be between -1 and +1 .
Trading financial instruments, including foreign exchange on margin, carries a high level of risk and is not suitable for all investors. The high degree of leverage can work against you as well as for you. Before deciding to invest in financial instruments or foreign exchange you should carefully consider your investment objectives, level of experience, and risk appetite. The possibility exists that you could sustain a loss of some or all of your initial investment and therefore you should not invest money that you cannot afford to lose. You should be aware of all the risks associated with trading and seek advice from an independent financial advisor if you have any doubts.
