SQLite: What is wrong with my query?

I have not looked at the database, but the INSERT query appears to be using double quotes (") to identify columns as well as literal data. If your columns do not use reserved words or spaces, I would drop the quotes. Moreover, the literal values should be using single quotes (') if I am not mistaken.

P.S. the number of columns looked suspect to me, but I did not mention anything. However, I just had a chance to download the database and a simple SELECT from the trades table yields the following error.

Error: malformed database schema (trades) - too many columns on trades

Therefore, you may have multiple issues going on. In fact, this may be the main error. Single quotes are the typical delimiter for literals—at least for those of us who also use SQL Server. However, I tried the following simple test in a new database.

CREATE TABLE "trades2"(
    "OpenedTime" INTEGER,
    "Touched" INTEGER,
    "Size" REAL,
    "MarginLevel" REAL,
    "Pair" TEXT,
    "Balance" REAL
);

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INSERT INTO "trades2" (
    "OpenedTime",
    "Touched",
    "Size",
    "MarginLevel",
    "Pair",
    "Balance"
) VALUES (
    "1357251341",
    "1357251341",
    "-0.67",
    "15660.100690485",
    "GBPCHF",
    "1000108.29"
);

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Everything worked fine. When I try the same two queries in your database I get the error above even though I am not querying the trades table. It appears it corrupts the entire database, which makes sense as the error is regarding the schema.

I don't think that the problem is because there are too many columns.

The database works, it just won't take my SQL to insert additional items.

Please test the attached database, thanks.
q2.txt
forexWorkingDB.txt