By default, MT4/MT5 charts show the bid price only. If interested in having the ask price shown on your trading terminal:
- Right click on the chart and select "Properties"
- In the "Properties" window, click the "Common" tab
- Tick "Show Ask line" and then click "Ok"
Candles in Metatrader only include the bid price and there is, unfortunately, no feature for displaying historic ask prices. All price history in Metatrader is based on bid prices only.
Buy orders get executed at ask price
Buy stop and buy limit orders, as well as take profit and stop loss orders of sell trades get triggered by the ask price. As Metatrader historic prices will not reflect the ask price these orders get triggered by, feel free to reach out to firstname.lastname@example.org for execution details of these types of orders.