Traders should take reasonable care to maintain sufficient available funds to avoid negative account equity due to position size and overnight swap charges especially during ex-dividend dates.
During the time period from 23:55 to 00:05 server time increased spreads and decreased liquidity can take place due to daily bank rollover. In case of inadequate liquidity/spreads during bank rollover, widened spreads and excessive slippage may occur. Therefore orders will not be executed during these times.