The DACXI coin is a low-liquidity coin, low liquidity coins sell on a 'matched deal' basis so a sell order must match a buy order or the deal fails. This doesn’t happen with a high liquidity coin, like bitcoin for example, as there are so many orders on either side.
For this reason, the DACXI coin has a size order limit to support the building of liquidity. The order size will be increased when liquidity increases.
If you'd like to understand more about low-liquidity coins, please watch the video below: