MT5 trading platform shows up to 100,000 bars by default.

It is the standard setting, and you can increase the number of bars to be shown in one chart by changing it.

The number of bars in one chart can be set from 5000 to unlimited number.

As long as your trading device(PC)’s CPU load and free RAM is available and can process the larger numbers of bars smoothly, you may increase the number of bars accordingly.

You may also note that by decreasing the number of bars, it could improve the execution quality of your orders sometimes.

To change the number of bars in one chart, please go to “Tools”→”Options”→”Charts”, and change the numbers of “Max bars in chart”.

The setting of maximum bars in one chart, doesn’t affect the accuracy of your indicators or EAs as these programs follows the data saved in hard disk drive of your PC.