MQL question

Hi all,

How can I get the higher/lower price for a symbol between 2 specific times?
Example: I want to get the EURUSD higher price between the 1.1.2008 00:00 until the 1.2.2008 00:00.
How can I do that ?

Thanks !

First you need the number of bars away from current price where the start time and end time occur. The iBarsShift() function returns that. Then you can use that number in the iHighest/iLowest funtions to return the high/low bar shift within that time range. Finally, the High[]/Low[] arrays are used to get the high/low prices. I'm at work so all I can do for now is point you in the right direction...

The functions get nested something like: High[iHighest(NULL,0,highBarShift(),lowBarShift()];

You should be able to use the help to get more details on these functions.

Good luck,

Hi ,

I am new to metatrader and saw an advisor with total winning trade percentage of only 14% but backtesting it makes money.Is that common?

I saw most of the expert advisors been sold on ebay have a much higher winning ratio 75-50 %.I dot know if this ratio is realistic or no

Is this number (wininng ratio)important when buying an expert advisor? or what is the most important parameters one should look for?

P.S:L the one I was talking about has 1.65 profit factor , 14% winning, expected pay off 303.66 .this was backtesting results from 2004 till end 2007.



Thanks

hi
i wanna import multi indicators in my expert code,but i don't know how do this?!
is there any keyword like "import" or "include" doing that or i must copy and paste those codes?

Moon, assuming that the data modelling quality is satisfactory, the next two figures that I look at are the number of trades, and profit factor.

If number of trades < 1,000, then IMHO the sample size is too small to offer any real statistical confidence.

Profit factor is a mesasure of expectancy. The higher it is above 1.00, the more profitable the test results are. Profit factor is the product of win rate and win size, i.e. ( #wins / #losses ) x (avg net win size / avg net loss size), which is effectively the same as $$ won / $$ lost.

If you only look at win rate, you're likely to be suckered into buying systems that probably:

i) don't use stoplosses, or where SL is much greater than TP. Such a system will have a very high win rate, because it only shows the results of realized P/L (i.e. from closed trades), but fails to show any losses that have accumulated as unrealized P/L (i.e. trades that are still open).

ii) that average down into positions, i.e. keep adding to a position as price moves against you. Eventually a long enough trend will occur that causes a big drawdown.

iii) Martingale MM. This involves increasing position size (usually by doubling) every time a loss occurs. Eventually a long enough sequence of losses will occur, that wipes out your account. In other words, Russian roulette.

These MM 'tricks' do not give a system a long-term edge. The bottom line is that expectancy is determined solely by how accurately entries and exits are timed, on balance, around market reversal points.

If a graph of the equity curve is available, then I like to see:
i) smoothness in the curve;
ii) the absence of any large downward spikes (drawdowns)

If the results of each trade are available, then I like to see:
i) consistent position sizing;
ii) a consistency in peformance across every year;
iii) whether the system is overly dependent on a few large wins for its profit, or conversely, much of the profit is being undone by a few large losses. Both represent statistical instability, IMHO.

Many indicator-based EAs are over-optimized, i.e. their parameters have been 'curve fit' to maximize profit over a sample size that's too small. A system that is robust will deliver profit across several different combinations of parameters. Given that we don't have access to intellectual property, one rough way to check this is to look for some kind of consistency in the test results, from year to year.

The bottom line is that if an EA delivered an genuine long-term edge, the vendor would not be selling it. Why would he want anybody else to make the same exponential income that he can make himself, by simply running his own EA?

More info on systems and vendors in this thread: http://www.forexfactory.com/showthread.php?p=172196

David

mr. hanover, i agreeing with you mostly ... and my eas i don't sell, even though is easy to making your own excel ea. My many friends making their own excel eas i know. too many to counting. so, it is not hard.

but here many reasons i thinking why might sell good ea:

helping others
gaining presteege, fame
another way of income
increasing number of ordering in same direction (making ea stronger)
business spirit, competing of other ea sellers

selling good product, nothing wrong. many are doing. (see many excel eas at collective2 or fxcm). some are my friends are them. they are happy and help others happy, making them happier.

but i agree must careful you should be, becaus many fakers in internet, too.

using iCustom(...).

tnx lot

ur welcome!