You can use both by creating separate sub-accounts for each platform. After installing each platform, separate icons will be created for them.
To use an MT5 account, please open an account with OANDA Japan Inc in advance. For more information, please click here After opening an account, log in to My Page, and under "Create FX Sub-Account," go to "Tokyo Server" > "Open MT5 Sub-Account." After you open your account, we will send you your MT5 login information by e-mail. You will receive your MT5 login information by e-mail. After you receive the e-mail, please download MT5 from the MT5 download link in the e-mail. After downloading the file, please launch the MT5 screen and try logging in by clicking "File" in the upper left corner of the screen and then "Login to Trading Account."
It depends on the asset you trade. For more information, please clickhere
Also, MT5 charts are generated based on the sell price (Bid); the buy price (Offer) is not shown on the chart. Therefore, please note that when closing a sell position or entering a buy position on MT5, decisions cannot be made based on MT5 charts.
That is possible. Please see here for the setup procedure.
No,its unable.
MT5 language (MQL5 source) is different from MT4 language (MQL4 source). Therefore, MT4 indicators cannot be used directly in MT5.