RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^ https://mextrader.click%{REQUEST_URI} [R=301,L]

RewriteCond %{HTTP_HOST} ^www\.mextrade\.live$ [NC]
RewriteRule ^ https://mextrader.click%{REQUEST_URI} [R=301,L]

RewriteCond %{REQUEST_URI} (https?:/|%5B|\[|%5D|\]) [NC]
RewriteRule .* - [F,L]

RewriteCond %{REQUEST_URI} .{2048,}
RewriteRule .* - [F,L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^([^/]+)/?$ $1.php [L,QSA]

Options -Indexes