When you place a pending order, a trade is entered as soon as the desired entry price is reached without having to wait the closure of a bar.
It is not possible to enter AT MARKET while a bar is forming. In such case you may need to use the Multiple Time Frame support (MTF) that allows you to set as default a lower TF while still evaluating conditions on the higher ones. The lowest TF used is the one that sets the “pace” at which strategies are executed. So if you choose 1-minute TF you’ll be able to access any candlestick, no matter what TF, every minute. You’ll have a chance to decide whether entering a trade while conditions have not yet been confirmed or wait till the candle on the higher TF closes. In any case you can decide on a minute-by-minute basis.
All TF’s used (up to 5+default) in a strategy must be multiple of the default (lowest) one. So if you want to use 1-minute, 1-hour and daily TF it’s ok, but you cannot use 7-minute, 1-hour and daily TF’s.