Rules generated are often nonsense / illogical with multiple symbols

Some further illogical rules, this time with just a single symbol rather than multi-symbol

==== Rule: Long entry ====

if (Is Bar Open

   and (No Trade Recently Closed

   and ((((Open(Main chart,0)[2] is falling)

   or  Open above BollingerBands(Main chart,0,75, 1.80).LowerBand)

   and (Bar Hour crosses below Volume(Main chart,0)[3]))

   or  Close above BollingerBands(Main chart,0,93, 2.10).UpperBand)))

Clearly you can't compare the hour of the day with the (tick) volume of a chart.

It is 100% critical that every output from a "function" has a unit, such as:

Price

Price Range

Number

Time

Volume

Percentage

And only those units that care comparable are used in rules, to prevent time wasted generating lots of nonsense strategies

For example, RSI outputs a Percentage, it can therefore be compared with any other "output" that is also a percentage.

It can also be compared with a constant (e.g. 25) as long as the constant is within the range of a percentage (i.e. 0 to 100)

Another rule that can be eliminated is comparing something to itself. 

Here's an example which results in a meaningless rule:

==== Rule: Long exit ====

if (Is Bar Open

   and ((MarketPosition("Any", MagicNumber, "") is Long)

   and (((ATR(Main chart,0,8)[8] >= ATR(Main chart,0,56)[3])

   and (Bar Hour < Bar Hour))

   and (SmallestRange(Main chart,0, 88)[8] is falling))))

==== Rule: Short exit ====
if (Is Bar Open
   and ((MarketPosition("Any", MagicNumber, "") is Short)
   and (((ATR(Main chart,0,8)[8] < ATR(Main chart,0,56)[3])
   and (Bar Hour > Bar Hour))
   and (SmallestRange(Main chart,0, 88)[8] is rising))))

Bar Hour is always equal to Bar Hour.

Any rule that compares X to X can be discarded in the generation.