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How do you account for commission when backtesting

I have been trying to edit my code to use an exact % of the account balance and it nearly does, but is always slightly off... I have tried many different edits and the following code is the closest that I can get... An example would be that on a

I have been downloading m1 Dukascopy data and converting it into all timeframes to try and make up for gaps in the default metaquotes history center data. Is Dukascopy m1 data more reliable than metaquotes? I am asking becasue results are VERY

OK, so having spent weeks messing around with different data and getting different results, I think I have found a good way to test my open prices only (once per bar) EA. Please note that I do not believe I need tick data for this testing as it only

I have a cci entry criteria when it above 100. However on one platform from my broker this can occur a bar before another platform on the same broker so causes a confliction between the results. Why is this? Surely the value of the cci should be the

I have downloaded data from the history center for Alpari UK amongst others but for some reason the data stops at the start of 2012 but goes way back to the 90's! Any ideas why? I dont want to have to go through the process of getting tick data from

OK, prob the most frequently asked question and one that causes the most confusion! I believe that when we download data from the history center (meta quotes), this data is in GMT+1 & GMT+2 time with auto adjustment for daylight savings. Is this

I only use open of bar not every tick on m15 and above...is it worth the time and effort to get tick data for 99% modelling quality? Some trades do close for a few pips but always on a new bar and not within a bar. I thought tick data was primarily

This is weird! I have downloaded different broker platforms and whenever I fill out an account with them (demo) and choose a server, I am redirected to the fxtm (forex time) site stating "thank you for registering here are your login details" - this

Is this data available, I have downloaded all timeframes multiple times in mt4 but cannot get data before then, is this normal? Alpari UK is the broker I am using

I am testing initially with open prices only as my EA only uses open of bars and indicators. Now when I test results from open prices only testing on every tick I get the exact same entries and results which is great. The EA does not rely on scalping

So I am testing my EA with the EXACT same parameters on the d1 timeframe and comparing 90% modelling quality using data from metquotes (history center) with 99% modelling quality using tick data from Dukascopy. I would have thought that the tick

I have read through the threads in the forum which seem to be outdated and not have an ideal solution. Is there a way to auto detect the difference between broker time and GMT without the user needing to input a GMT offset? Currently I use code that

H1 EURUSD FROM 2001 with 2% risk per trade. I am looking at the areas that need improving. Test has been confirmed with a tick test (EA uses open prices)

Hi, When testing EA's, are you more concerned about the max or relative drawdown, perhaps both? I think max drawdown is more important as this determines the drop from the "balance" whereas relative determines the drop from the "equity". This way I

I want my EA to only enter on the first signal, e.g. when the 3 MA crosses the 8 MA when both are above the 200 MA. At the moment the EA will do this on every cross above the 200 MA, but I would like to set it to ONLY enter on the first 3/8 cross

I have been heavily optimizing my EA with genetic algorithm checked for faster speed. I found some excellent setting combinations but when I try to combine these with other settings those particular sets seem to be avoided by the optimization

For some reason when back testing with hundreds of trades over 10 years I get the occasional order modify error 130...The EA can have multiple orders open at the same time and when another order is open when the previous order is in profit it will

I keep getting the error when closing out part of the lots of a trade and cannot seem to fix it, any ideas? It does not perform order modify on the sell order either which is strange! void BreakEven1() { if (BreakEvenType== 1 ) {

I am looking for a way to close ALL open orders rather than just the current code I have which closes just 1 order: void IfOrderExists86() {      bool exists = false ;      for ( int i= OrdersTotal ()- 1 ; i