Offline Renko Chart showing combined currency profit of 1-7 pairs

Hi, i need an offline chart showing renko bars of combined Profit of 1-7 pairs.

Option to "mirror" each pair - so if it is mirrored, then it will calculate the profit of that pair as opposite.

I want a finished mq4.  You can have first choice at upgrade jobs to it.

Also, the EA should automatically detect whether 4 or 5 digit broker and whether 3 or 5 digit pair. 

also, the offline chart should update when this EA is changed on the main chart (such as bar size changed) - No excessive waiting and no need to re-attach expert when changing settings.

External variables something like this: '

BarSize= 10     // 10 "pip" renko bar where a pip is actually combined currency profit (based on the selected lot size and whether "mirrored".) for example, if profit of three pairs goes UP $10 then it paints a 10 (dollar) renko bar closed UP.

symbol = EURUSD

mirrored = false

lot = .1

symbol = USDJPY

mirrored = false

lot - .1

symbol = EURJPY

mirrored = true

lot - .1

the result would be an offline renko chart showing combined total PROFIT movement of EURUSD and USDJPY and EURJPY (considering lot size and also whether "mirrored")

For example, using the above inputs, if we are drawing a 10 pip renko 'profit' bar:

if EURUSD moves +$10 and USDJPY moves +$20 and EURJPY moves +$20 it will calculate the EURJPY as if profit is -$20, because the extern variable example shown above here is selected as "mirrored = true", so it will calculate the EURJPY profit as if it is in the opposite direction.

So the result here would draw a single 10 dollar renko "profit" bar closing UP. (10 +20 -20 = $10 )

Im not sure if should be a script, an EA, or what.

*Must be able to put indicators and EA on the chart like normal chart.

Thank you.