On some trading section of exchanges, you can check the chart of a coin from the opened position of each coin while there is a coin you selected for trading.
Example is this:
The white is bitcoin which is the coin I selected, but you can see AKE in yellow which I can click on. Anytime I go back, it is bitcoin that I can trade.
How a problem can happen
You may want to be trading altcoins with $25 because of their high volatility, but trading bitcoin with $1000. The altcoins can be where bitcoin is in that image and bitcoin where the altcoins is. Maybe you first open $200 position for bitcoin, later decide to make it up to $800 but instead you open $800 position for the altcoins.
This happened to me two times now, making me to cancel the position and lose money on trading fee up to $5.
