I am reading a lot of you're post in this forum and I'm learning so much ..

Thank you !

Here are the results of 30 systems applied to random market data over 500 trades. The red equity curve is a result derived from 'biased market data. By using smaller sample sizes, performance metrics will not pick this up.

Only with a large trade sample will you have a hope of discriminating between a random equity curve versus a non-random one.

I totally agree.  I've written long ago about the reverse trading. 

In a simplistic terms, we think that a bad EA is due to wrong direction.  However, upon closer examination, it's far more complicated why an EA isn't making money.

1. Wrong direction (simplistic view)

2. Correction direction but late exit

3. Correction direction but premature exit (low reward/drawdown ratio)

So even if you reverse a bad EA, you don't turn a bad EA into a good EA.  Because a good Ea comprised of both good opening rules and closing rules.  Reversing the opening direction doesn't reverse the closing rules because bad EA usually exit because of hitting SL or tight SL or premature exit.

I won't want to waste time "harvesting" bad EA and hoping reverse trade will make it profitable.  Even if it's profitable, I don't think it's performance metrics such as profit factor etc would be outstanding.

Nevertheless, out of curiosity, we sometimes still want to try despite being told not too.  I tried and thus I speak.

Spot on H. Here is a good example of a system with an exceptionally poor result (green) and the result (in blue) if I flipped it.

Clearly there was no serial correlation present in the equity curve despite the visual deteriorating performance.

The vast majority of strategies that are profitable simply are a result of 'random' luck. Very few possess a definitive edge where the positive bias in the series is sufficient to overcome the negative bias of frictional costs.

....but there are a  few instances where evidence of serial correlation in a declining equity curve can mean that a flipped strategy is profitable....however they are as hard to find as profitable strategies with an edge.

However, please note that EA Studio creates the best experts for the given market data and settings. The reversed signals may not achieve similar performance.

I totally agree.  I've written long ago about the reverse trading. 

In a simplistic terms, we think that a bad EA is due to wrong direction.  However, upon closer examination, it's far more complicated why an EA isn't making money.

1. Wrong direction (simplistic view)

2. Correction direction but late exit

3. Correction direction but premature exit (low reward/drawdown ratio)

So even if you reverse a bad EA, you don't turn a bad EA into a good EA.  Because a good Ea comprised of both good opening rules and closing rules.  Reversing the opening direction doesn't reverse the closing rules because bad EA usually exit because of hitting SL or tight SL or premature exit.

I won't want to waste time "harvesting" bad EA and hoping reverse trade will make it profitable.  Even if it's profitable, I don't think it's performance metrics such as profit factor etc would be outstanding.

Nevertheless, out of curiosity, we sometimes still want to try despite being told not too.  I tried and thus I speak.

Thankyou

It is possible to do that for an entire portfolio ea ?

Thankyou

In the ManageOpen() function replace OP_BUY with OP_SELL and vice versa. It must be arraund line 160 in the EA.

   if(canOpenLong)
      OpenPosition(OP_BUY);
   else if(canOpenShort)
      OpenPosition(OP_SELL);

However, please note that EA Studio creates the best experts for the given market data and settings. The reversed signals may not achieve similar performance.

Just wondering if there is a way to reverse the trade e.g from a buy to sell if the logic of the EA tells it to be a buy?

Not to change the EA logic but only the opened trade to the opposite direction?

Is this possible just wondering..

Much appreciated,
Roberto