By reducing the maximum number of bars displayed, your device does not need to render as much graphical information which can lighten your computer’s processing load, leading to quicker responses.

1. Open MT4/MT5
2. Select Tools, Options, then Charts.
3. Find the Max bars in chart and Max bars in history options, lowering both of these values by 50%. You can go as low as you like, but test this setting for an improvement first.

Less bars need less rendering, and may improve overall performance.

MetaTrader features a newsfeed (located in the News tab of the Mailbox area) that automatically provides financial news of interest to users of the application. 

News may increase the load on the platform, so you may want to disable this feature if the goal is to improve the speed of MetaTrader:

1. Open MT4/MT5.
2. Select Tools, Options, then Server.
3. Untick Enable news and then click OK.

Now the newsfeed will not update which can speed up MetaTrader.

Any device can benefit from optimization of RAM, especially when you consider they constantly run some background features of the platforms. Disabling some of these may not impact specific trading functions while improving performance.

1. From the Market Watch window, disable or hide all instruments that you do not plan to use by right-clicking the instrument and selecting Hide; this may free up some of your computer’s memory.
2. Close all charts not in use by clicking the x icon on that graph’s window.
3. If you are running any Expert Advisors, consider disabling any logging functions as this eats into your computer memory.
4. Restart MetaTrader from time to time to refresh the memory.

Use the built-in user profile to easily load settings that optimise performance. Then you can easily toggle these settings as needed:

1. Set your preferences as needed.
2. Open File, Profiles, then Save As: give your new profile a name.
3. Now you can simply return to Profiles and load your optimised profile from the list whenever needed.

This is useful for creating a profile where the preferences are set to minimise the impact on your device and improve performance overall.

Some custom indicators may not be optimised and can impact the performance of the MT4/MT5 platforms; however, the default indicators that come with MetaTrader are optimised to not impact performance.

If you are looking to increase the execution speed of your trades made with MT4 and MT5 specifically, and your problem is related to your internet connection and bandwidth, do consider applying for a VPS with Exness as it is completely free if your Exness account qualifies for it.