Why is the limit order/stop order/stop limit order that I created not executed even though the price on the chart has touched the price that I specified?

Your order will only be executed if the price on the exchange has touched the limit price/stop price that you have specified. However, there is still a small possibility that your order will not be executed even though it has touched the price you specified if the asset liquidity is low. This is done as a form of consumer protection from Pluang to avoid the possibility of your order experiencing high price slippage.