Loaded M5 historical data of Nasdaq futures from MT5. But in Wealth-Lab, the chart shows gaps. How to remove the gaps? 
Rename
You should assign the proper market to your "NASDAQ" symbol. By default it's "US Stocks" which doesn't apply to Futures. You can do it in Tools > Markets & Symbols | Symbols tab (more detail in the Help).
You need to do what Eugene said, but for a quick "fix" to see all the data just uncheck Filter Pre/Post (which is filter for U.S. Market hours).
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