I cannot find related topic about multi signal provider.
I am trading on 2 accounts which are somewhat heading each others, but I do not know how can I provide both signal on my account.
Any info would be helpful.
Do you mean as a signal subscriber, you want to have a fixed lot size of 0.4? If so, it's not possible to set a fixed lot size using the signal service and the built-in MetaTrader signal options. It's also a bad idea as it changes the logic of what the signal provider is trying to do with his strategy.
And yes, you should either leave your PC on 24/7 or get a VPS. As soon as MetaTrader is off, you can't receive the signal
While testing my signal as both Signal Provider and Signal Subscriber to make sure everything was working fine I came to a conclusion. Most signals with any kind of money management (e.g. either increasing or diminishing base lot size when winning/losing X times in a raw, or martingales or pyramiding with increasing/decreasing lots, etc.) won't work as intended by the Provider unless the Subscriber a) has the same exact amount of balance +5% and leverage or b) his balance and leverage make the client calculate the lots by 100% steps (percentage for volume conversion selected according to the ratio of balances and leverages equals to 100% or 200% or 300% etc.)
Would have been so very easier to allow the Subscriber to over-ride the automatic volume conversion as an option and let people select a volume multiplier within a reasonable range of their balance/leverage ratio.
As it is, I would not advise to subscribe Signals using any kind of built in money management.